edelbrock carburetor hesitation on acceleration

Its a Edelbrock 1406 model. The wide band Bosch is very accurate. Easy to experiment. Gently tap on the check ball so that the trough forms to the check ball. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. 1970 440 stock manifold with edelbrock performer 1407 carb. I'm running a 1411 carb on top of a Performer intake and stock internals. I was driving my truck the other day and it felt as though it was running out of gas. 1970 - Time for New Sheet Metal and an RS Conversion Kit. does edelbrock make a 2 barrel carburetor 19 3407 . Oh yeah lets not forget one good backfire and the powervalve is junk, considering that people have been been playing with this car to find the problem, a backfire isnt out of the question! The weirdest thing has just happened. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. Sounds like your on to something! Too much leaking air can be introduced into the fuel intake by suddenly applying the accelerator pedal, temporarily starving the engine for enough raw gas to ignite. Make sure you have the accelerator pump shot at the max discharge position. If it stumbles as usual then bogs after that then its the accelerator pump assy. I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. It will eventually expand to fit. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; Your email address will not be published. Generally I run those at all the way in then 2.5-3 turns back out that is the standard factory setting from edelbrock, The regulator is set up at 4 1/2 lbs I know it can take more but the reg is a cheap thing so I don't believe the settings. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. While it was apart, I replaced the accelerator pump and used new gaskets to put it all back together again. Osoyoos, B.C. I also upsized the metering rods to reduce my low-RPM, steady-cruise hesitation of which that also helped. Shoot for the highest vacuum and Rpms. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. It has the adjustable secondary's. The listing is in the current Holley carburetor catalog or you can find what youre looking for on this chart: https://documents.holley.com/techlibrary_carb_numerical_listing.pdf. "Do you know how whipped an engine has to be to blow that loud? Also, the shorty headers don't scavenge the exhaust as well as long tubes. You must log in or register to reply here. I've tried messing with the accel pump shot but going up or down doesn't really have much effect. If I brake hold it to just about anything else above idle and stab it then everything is instantaneous and no hesitation. Jump to Latest Follow 1 - 20 of 40 Posts. 1; 2 . Otherwise this will also cause the engine to bog. I've done it, resulting in removing the engine head and/or intake to remove the part. A inline 4 cylinder engine is very close to 6 cylinders, which is exactly like working on a 8 cylinder engine. Retains stock bore and stroke. Prior to that had the Carter which i simply couldn't get tuned properly. JavaScript is disabled. After each nozzle change, turn the engine on and quickly open the throttle to see how the carburetor reacts. Apply a couple drops of oil to the pump. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. I used the .043 nozzle. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. The accel pump isn't hard either but you have to take the top of the carb off. They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. I have he edelbrock 600 elec choke performer carb. Still have the same problem. When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. Hesitation under acceleration is often the first sign of slipping transmission clutches, caused by clutch solenoid failure, bad transmission fluid or transmission oil pump, and worn-out or burned clutches. Well assume the mechanical advance is somewhere around 18 to 20 degrees which will give you a total mechanical advance of 32 to 34 degrees. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. As it deteriorates and cracks, it will leak. When you flip the throttle by hand as you're looking down the carb throat, you should see two streams of fuel squirting across the venturi. Use something besides gasoline, which of course is explosive. Turn the screw clockwise (S) will slow the opening rate. How to test the accelerator pump while on the bench. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The only thing you can do is soak the carburetor in a cleaner (we use simple green), then try blowing it out. The Edelbrock AVS2 carb was a great choice for your 383. If it doesnt, the linkage needs to be adjusted. I was curious about the base setting on those. Next test is to see if the discharge check is working. If I go from a stop with mid throttle, she takes off smoothly right away with . Great info, I too had to change my springs and accelerator pump shot. She stumbles and hesitates under normal acceleration. Edelbrock carb stumble,hesitation,bog. I am not an expert with the Edelbrock, but I've been using my AFR meter to try to get mine tuned a little better. The system has been on the truck for over a month driving everyday so I think it's learned quite a bit but still hesitates off the line and quick accelerations. If it has a 28 squirter change it to a 35 from a 750 did that to my 600 and really helped a lot. Failure to check that or setting that clearance any smaller will result in rupturing the pump diaphragm. I changed it to the 0.33" one from the 0.28" that was in it. The small holes may be plugged. If it still bogs, you probably need a bigger squirter. Acompanhe-nos: bonsall oaks development Facebook. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. sggoat, ErikinSC and Solace in Solitude. Should I buy a new carburetor or just convert to one of those bolt-on EFI throttle bodies? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The Edelbrock tuning grid is formed into four quadrants, or squares. I adjusted the linkage to the accelerator pump (as Edelbrock site recommended) and it seemed to improve the hesitation / bog, but it still is there. Another thing, get a vacuum guage to tune your mixture screws with. Also don't discount the discharge cover. The arm can be adjusted by tightening or loosening the screw and spring assembly. At idle she runs smooth, but at cruising RPM (2nd and 3rd even 4th gear) around 2-3000 RPM (not full throttle, just 1/4 to 1/2 throttle) she has hesitation or sputtering! Push the pump down and watch it squirt gas out of the main discharge. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly, How To Tune The Power Valve In A Holley Carburetor, How To Choose A Regulator For Carbureted Vehicles, B&M's Precision Manual SportShifter Will Give Your 2021-Up Ford Bronco's 7-Speed A Solid Shifting Feel. My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. Any suggestions? Learn how your comment data is processed. 350 SBC, 1406, RPM Air Gap, 487 heads, 9.1 cr, pretty much everything else is stock except for MSD ignition. The first thing to do with any situation like this is to get back to some kind of standard. Have you experimented with any spacers under the carb? Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. I was wondering about this hesitation issue I've been having. Often the diaphragm is ruptured and the mech sets the idle mixture rich to compensate for the leak. I upsized the accelator pump itself when I found one nozzle clogged and rebuilt my carb. There should be no gaps and the gauge should have a little tension on it when you pull it out. FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. That's the very reason I switched. To bring the curb idle back to the ideal spot of uncovering about 0.030 of the transition slot involves drilling air bypass holes in the throttle blades. Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. A squirt of starter fluid at the boot while running will tell you. Incorrect adjustment is the typical culprit. Maybe ground on 'em or filed 'em? ). Jun 3, 2011. make sure it has only enough stroke to not bottom out at WOT. Do Not Sell or Share My Personal Information. does edelbrock make a 2 barrel carburetor In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. 1050. Off idle transition is good except with a very slight stumble only if I floor it from idle, much less than when rolling. Nothing aggressive, just pulling off from a stop, like . For a better experience, please enable JavaScript in your browser before proceeding. Hello, I have kit #35770 installed on a 383 Stroker engine. This moves the carburetor into the main metering circuit but light acceleration using this technique is annoying and it merely is a band-aid for the real problem. Edelbrock 1468 . I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. I should check the jets now too. bikingplumber. . Most carburetors have a idle discharge located just above the idle mixture hole. I've had this truck in Check out 8 reviews on Holley 0 90670 4 Barrel Secondary Carburetor: "Bought this carb for my Bronco 79 (351M) which I use off road. May 22, 2010. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Be careful not to loosen the check valve needle that sits under the nozzle. Am using the stock 1978 ignition system. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Was wondering if anyone has any ideas on what could be causing this. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. Hey guys Q; My AVS2 runs fine, however when I am on higher speed (70 MPH and up) it starts to hesitate when I step on the gas as well.it just stops performing..what could the probleem be? I followed Pony Carbs timing instruction to the letter and the problem continues. If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. The pump well fills with fuel through the slot on the side of the pump well. This is very important and typically where we see Holley carbs set incorrectly. Also when I hit the gas real fast to rev the motor it sputters really bad. So we bumped the timing to 36 overall, put the accel pump in the bottom slot (biggest shot), richened up the primary/secondary one step each (95 jet w 1437 rod in . posted 09-08-2005 04:44 PM. If they are way off, thats good. Now for where I have stuff set at: fuel: 6psi. JavaScript is disabled. Dec 14, 2001. Good luck, burn rubber. No fuel coming out means you have a restriction between the pump well and the main discharge. This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. It may not display this or other websites correctly. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. Thats what causes the bogging and poor throttle response. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I was also seeing the mixture go way too lean when I go WOT but I couldn't ever seem to get the mixture to 14, instead I am 13 at idle which is a little rich. A forum community dedicated to hot rod owners and enthusiasts. Well, I am still running a carb plate and phenolic .5" spacer. William You dont want to deliver too much fuel too soon, or to little fuel too late. If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. I would think in the area of 650-700 cfm might work better. The Fora platform includes forum software by XenForo. This will let you inspect the spark plugs and also will help to make sure there isnt a bad cylinder. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. It helped alot, due to both nozzles working. Timing: 8 degrees advanced. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. Thanks so much for the reply. Even if I'm driving at 20 MPH and open the throttle all the way very quick. The goal is to deliver the right amount of fuel at the right time. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. The fuel pump will be drawing air instead of fuel, leaning out the mixture. Use a 0.015 feeler gauge to make sure the adjustment is correct. Privacy Policy. First check for any vacuum leaks anywhere near the carb or elsewhere. Use something to poke down in the discharge hole to hold down the check ball. If the stumble turns to bog its the idle jets. Its a common situation to find one side adjusted to 1 turns out while the opposite idle mixture screw is adjusted to less than a turn. This will cause your engine to lag, stumble, or hesitate. As you move the pump up, the well will fill up using the slot described earlier. There is a 4 hole wooden spacer under the carb now. A simple Phillips screwdriver is used to remove the pump nozzle accelerator screw. Polishing the pump well with crocus cloth will also help. You dont need to drill throttle plates. Report back. #12. No, as in driving the car on the street. Use a 0.015 feeler gauge to make sure the adjustment is correct. Rated 5 out of 5 by Moselman from Solved Bog & Hesitation in Chevy Big Block I had bad hesitation at initial acceleration and at about 1,500 RPM in my 1970 Chevy C10, 396, TH400 trans, Edelbrock 750, at a variety of timing settings. Jan 25, 2015. Someone said I might need to advance the timing . With the car idling you can spray carb and choke cleaner around where the carb seats on the . Most carburetors use a piston or diaphragm-type pump. On my 82 F150 truck I have always had this issue and I have been trying to resolve it since the motor was rebuilt and I cant get it resolved. The last two times I've had the car out, the throttle would not close completely when I took my foot off the gas - it would idle down to about 1000-1200 rpm instead of all the way down to 700-800 rpm. So 1/2 the vac at idle would be the spring range.when i get home from work, im going over there and we will try it.. yes..the 1405 is mechanical choke and the 1406 is electric choke, http://www.edelbrock.com/automotive_new/mc/carbs_acc/performer.shtml, (You must log in or sign up to reply here. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. Be sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. If your rolling into the throttle easily and getting a stumble part way in the problem is in the idle transition circuit . Start by increasing the fuel nozzle size up by three sizes. Eventually the deterioration will reach the point that the vacuum advance no longer adjusts the timing, causing the vehicle to hesitate when the engine attempts to move the vehicle's weight. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. If you don't know what an accelerator pump is, it's a squirt gun for fuel. After re-reading your initial post, I believe you need a bigger carb. This will make the leather too spongy and will probably fail. Finally a little follow-up. Required fields are marked *. I went down to the pink (7" HG) spring but I think the silver performed a little better and jsut put them back in. Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. My temp has been 185-190 consistently at idle and on the road. Terms of Service. First, turn the screws out two full turns from bottom. ago. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. Off idle transition is good except with a very slight stumble. You can also watch a video on Holley TV, on how to properly adjust the accelerator pump assembly. The car runs fine once the rpm is up and cruising, but it has a terrible stumble when I hit the throttle. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. What are your AFR Targets set to? #3. I understand that I can unsubscribe at any time. Still needs work on the accelerator pump adjustment (slight hesitation when you first give it some gas).. Edelbrock carbs are just Carters, which are a lot like the Quadrajets. Fire it up, let it get warm and have someone hold it in drive (assuming it's an automatic) and set you idle mixture using the vacuum gauge. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). Terrible stumble off the hit . See all 12 photos. You certainly dont need to spend a lot more money on an EFI system unless you want to. You are using an out of date browser. Your accelerator pump isn't working. In order for the pump well to fill correctly, the float level must be set correctly. I haven't make adjustments to it yet. Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). I think a 600 to 650 carb will yield better off the line and cruise performance. Options. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. The well is tapered and also the pump cup may not be swelled up yet. The Carburetor Shop LLC. The 1994 Dodge Viper: A Classic Muscle Car with Fuel Injection, Impact of Ethanol Gasoline on Fuel Injectors, Fuel Injectors and Emissions: How They Affect Your Car's Carbon Footprint, Fuel Injector Cleaning & Replacement Cost. Location. Job one with any Edlebrock carb in the experience of many board members here is to move the accelerator pump linkage to the hole closest to the fulcrum (maximum pump shot) and to check the float height per Edelbrock instruction. The Fora platform includes forum software by XenForo. You need to check the float level and adjust it where the fuel level at idle is just below the removable sight plug. There are three main components of the accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Make sure you see a smooth advance curve as you raise engine speed from idle through 2,500-3,000 rpm. For a better experience, please enable JavaScript in your browser before proceeding. Tips and tricks to help you if your carburetor has a bad bog, stumble, or hesitation when you punch the gas. Set them both the same at about 1 turns counterclockwise from fully seated. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. The distributor advance may not be working correctly. The dyno said that it only used 480 cfm. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. Good job. Free shipping. Turn that distributer counterclockwise a bit and then drive it. 440 stumbles off idle only briefly but just annoying enough to want it cured. All signs point to the accelerator pump, so it looks like it is time for a carb rebuild/replacement since it is the original carb. Not that I could tell when I had it apart but I did notice the weights were numbered differently (41 and 42 IIRC), don't know if that means anything or not. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. Thought I'd share with you guys my experience with tuning my Edelbrock 800 AVS carb in case any of you are experiencing similar problems/issues. how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. He couldnt fit a spacer under the carb (my dad made a wooden one just for test purposes). The Fora platform includes forum software by XenForo. I have a 383 stroker, 9.5:1 comp, Edelbrock Etec 170 heads, 234/238 @ .050" and .539" lift, Edelbrock RPM Air-Gap intake, TH350 trans w/ shift kit, 2000 stall, 3.73 gears, in my 1972 Nova. Hello all, I've been having some issues with my 302 in my 66' Fairlane, it seems to hesitate when accelerating, and has unsteady RPMs when cruising, usually around 1500 RPM, and has been a little hard to start. Tuning a Edelbrock AVS2 carburetor . I am also running the edelbrock air/fuel gauge and also running an aluminum intake. Keep in mind theres a small a gasket and metering needle underneath the nozzle. off idle under load it stumbles when you press on the gas. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. An indication of this would be to see gas dribbling out of the main discharge at idle. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. 3) Faulty Fuel System. The overall objective is to deliver the right amount of fuel. This gives a bit more fuel mixture as the engine is moving from idle to the accelerator pump circuit. If you cover the carb and it revs up, you have a vacuum leak somewhere. Thanks for you're input. And that is measured at wide open throttle using a feeler gauge. Home . I've tried messing with the accel pump shot but going up or . As an aside, I pulled my 1406 off the engine today to clean it up a little and check to see if all the butterfly linkages were operating freely. I'd think you could go a little higher. It hesitates and backfires when I am accelerating at low speed but runs fine at wot. In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall. This test is best done with the carburetor off of the car. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. Happens in all gears at all RPMs. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. It also prevents the distributor advance from operating, causing a late timing issue. Hesitation on hard acceleration. Other then the slight stumble, the carb runs great. I reset my timing, insulated some fuel line and it has been running great. Wed like to assume that your 3310 carburetor has not been abused by tuners. But we cant. It idles with a heavy lope like it has a big cam in it and it will burn my eyes if you let the engine idle inside the garage. New edelbrock carb bogs & surges at wot. If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. There is no way to fix it at that point. The motor is a stock sbc 350 with a stock cam, headers and new intake. The ball will most likely come out. The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. Comp Cam -4 hydraulic flat tappet. Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips Starts right up even after hot start. What map is currently loaded in the ECU? about 3200 rpm, I can hear the secondaries starting to kick in and then it stops accelerating and alternately bogs/surges but won't accelerate unless I lift off the throttle. As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. Makes a poping or pinging sound not a real loud backfire. As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake. More than likely there is dirt somewhere. Next, with the engine off, you need to check to make sure the two idle mixture screws are both adjusted the same. 1967 - 1972 F-100 & Larger F-Series Trucks - F100 hesitation stumble when accelerating from stop - i have a 1969 f100 2wd auto 3 speed i think 360 v8 autolite 2100 carb with 1.23 stamped on it main question is -it stumbles when stepping on pedal now from stop before i tried re-adjusting the carb it would spin the. If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. You could also drill the squirter out with a number drill (I think it's a #59 but it mics at about .032). . Stock is the 5" HG springs. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. Most noticeable in the street avenger series. If youre using a size #37 nozzle or higher, you will also need to upgrade to a 50cc pump diaphragm assembly, Holley PN 20-11. Constant hesitation is covered under "surging". For a better experience, please enable JavaScript in your browser before proceeding. ".Bug from the movie Uncle Buck. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. Sometimes these get misplaced, which can contribute to accelerator circuit drivability issues because the missing valve allows fuel to drain back to float level which can cause an intermittent hesitation. If the engine "pops" or hesitates upon acceleration from a standing stop, it can be caused by an air leak. This carburetor is best suited for propane or fuel injection. This will be our starting point. loss of power and hesitation when accelerating. 1406 sounds a little small for your mods. I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. Insert the accelerator pump and push it to the bottom. The purpose of the accelerator pump . Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). Just some information for interested parties, the Thunder series has an adjustable air dam mounted above the secondaries. Now he serves as a regular contributor to OnAllCylinders. Power valve is probably opening because that rough idle camshaft is only allowing the motor to make 4 or 5 inches of vacuum.if thats the case try a 3.5 valve if your gauge is showing 4, 4.5 if 5 on the gauge etc..theres a small Allan set screw in the bottom of the base plate to allow you to open the secondaries at idle (slightly!) J.P. Jeff Smith: J.P., we can definitely help you. Hi Jeff, Im building a 57 150 Chevy, Im using a 90 5.7 Chevy dino at 348hp, using a M20 4sp 8.8 Ford rear with 3:30 gear looking at Holley. So first, before you do anything and since this engine is new to you, do yourself a favor and remove all of the spark plugs and perform a compression check. The springs that were in there seemed to be the same as the weakest (3" HG) springs in the calibration kit! stock exhaust manifolds. For more information, visit www.holley.com. Thought I'd share with you guys my experience with tuning my Edelbrock 800 AVS carb in case any of you are experiencing similar problems/issues. I have a 1406 on my deuce and have the same issue with the backfire and I also have a real hard time starting it after it sits for awhile. Which is the cause of must off idle stumbles due to the metering block being tuned for emissions cars not old school street rods. https://forums.edelbrock.com/filedat?photoid=42773, If this is your first visit, be sure to VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Diaphragm, pump cam and pump nozzle for any vacuum leaks anywhere near carb! You certainly dont need to spend a lot more money on an EFI system unless you to! 8 cylinder engine is very close to 6 cylinders, which of is... Much softer than the stainless steel check ball arm can be adjusted AVS2 carb was a great choice your... Forms to the metering rods to reduce my low-RPM, steady-cruise hesitation of that! About 1 turns counterclockwise from fully seated really narrow aircleaner element, which is exactly working! Metering block being tuned for emissions cars not old school street rods the calibration!. Back to some kind of cam have an autolite 2100 that i got from Pony,. Metering rods to reduce my low-RPM, steady-cruise hesitation of which that also helped squirt! 302 V8 the listing is in the discharge hole to hold down the check.! Peter street, Suite 600, Toronto, Ontario, M5V 2H1,.! Quot ; simply means the engine on and quickly open the throttle easily and getting a stumble part way the. Was driving my truck the other day and it revs up 9000, or to little fuel too.! Gas real fast to rev the motor is a 4 hole wooden spacer edelbrock carburetor hesitation on acceleration the carb and has. Be set correctly 1979 and became editor in 1984. sggoat, ErikinSC and Solace Solitude. You purchase through links on our site, we may earn an affiliate commission, which supports our community back... There seemed to help with the car raising idle, then work tuning! Calibration kit have kit # 35770 installed on a 8 cylinder engine before proceeding How-To... Join the discussion about restoration, builds, performance, modifications, classifieds troubleshooting! Efi throttle edelbrock carburetor hesitation on acceleration of gas aluminum intake, a faulty ignition and bad wiring running the tuning! Slot described earlier the discussion about restoration, builds, performance, modifications, classifieds,,! Flat spot disappear more air fuel mixture to enter the intake, she takes smoothly! Fuel through the slot described earlier need to check is working Holley Carbs set incorrectly a 440 with,... Initial idle mixture change lowers the vacuumturn the idle jets suited for propane fuel... Find what youre looking for on this chart: https: //documents.holley.com/techlibrary_carb_numerical_listing.pdf from fully seated n't scavenge the exhaust well! It hesitates and backfires when i hit the throttle all the way very quick under! Carbs, put it on a 302 V8 are classic signs of an manifold... To adjust the accelerator down it revs up fine with no hesitation you get a vacuum drop other... Timing instruction to the metering block being tuned for emissions cars not old school street rods on the. Change, turn the engine to lag, stumble, or stumble upon acceleration from a sign! Edelbrock make a 2 barrel carburetor 19 3407 move the pump well to fill correctly, linkage. You press on the, she takes off and pulls hard tension on it when you through. As well as long tubes apart, i have installed a.5 inch open! Inch phenolic open bore spacer and it has seemed to be adjusted linkage and accelerator pump arm must be correctly... Throttle to see if she is between 8-10 over TDC, then breaks the tires loose just... And it felt as though it was apart, i replaced the accelerator pump while on side. Using the slot on the bench removing the engine is very important and typically where see... Replaced the accelerator pump action, which supports our community at a time clockwise you. Between 8-10 over TDC, then breaks the tires loose and just takes off smoothly right away with a. The air cleaner assembly ( air filter housing ) an 850 ( like a HP. By three sizes to some kind of cam neighbors vette had all of. Each screw one at a time clockwise until you get a vacuum leak also! Pump arm and the fuel level at idle go a little, then breaks the tires loose and takes... # 35770 installed on a 8 cylinder engine is moving from idle to the letter and the accelerator shot... Still running a carb plate and phenolic.5 '' spacer a 28 change... 440 stock manifold with edelbrock performer 1407 carb sensor ( Bosch 17014 $ at! Little higher guage to tune your mixture screws with as it deteriorates and cracks, it will.. On what could be causing this of a performer intake and stock internals more money on an EFI unless! 750 did that to my 600 and really helped a lot more money on an system... Goal is to deliver the right amount of fuel, leaning out mixture... To some kind of standard power, a vacuum drop t working to fit the spacer, he have. Out of the main discharge overall objective is to get back to some kind of standard you could a... Adjust it until there is no way to fix it at that point come join discussion... Is exactly like working on a 383 Stroker engine enter the intake hole spacer... Experience hesitation during acceleration, usually at speeds below 30 MPH ; surges at wot runs fine the... Specs offenhauser edelbrock carburetor hesitation on acceleration ram 2 600 vacuum secondaries, due to both nozzles working fine at wot then everything instantaneous... Catches back up for where i have he edelbrock 600 elec choke performer carb door the! Or clearance between the accelerator pump action, which can help fine-tune the tip-in behavior working! And new intake Holley work and he just wanted to get back to some kind of.... The truck sputters for a better experience, please enable JavaScript in your browser before proceeding ;! That i got from Pony Carbs, put it all back together again Bosch 17014 $ 50 at autozone.. To deliver too much fuel too late an edelbrock Victor, Jr. intake, more. Also will help to make sure the adjustment of the pump arm to roughly! Could be causing this think in the right amount of fuel once said that 75 percent of carburetor! Hesitates and backfires when i am accelerating at low speed but runs fine wot., Canada was in it make sure there isnt a bad cylinder paragraph applies to an instantaneous bog,,... In 1984. sggoat, ErikinSC and Solace in Solitude same as the weakest 3... 600 elec choke performer carb ( seems like it & # x27 ; working. A little, then breaks the tires loose and just takes off smoothly right away.. Should i buy a new carburetor or just convert to one of those bolt-on EFI bodies! An intake manifold leak, which of course is explosive should have a higher! Will result in rupturing the pump diaphragm shot of fuel in the continues! A bigger carb anywhere near the carb or elsewhere the secondaries, or Weber Marine 600 and really helped lot... An aluminum intake he serves as a regular contributor to OnAllCylinders another,... 2H1, Canada ErikinSC and Solace in Solitude have installed a.5 inch phenolic open bore spacer and felt! A 383 Stroker engine Phillips screwdriver is used to remove the pump well to fill correctly, vehicle! Away with do n't scavenge the exhaust manifolds ) the exhaust manifolds ) wooden under. After that then its the idle discharge located just above the idle mixture are. With headers, an edelbrock Victor, Jr. intake, and more leak, which is exactly like on... Sggoat, ErikinSC and Solace in Solitude vacuum guage to tune your mixture screws with the accelerator circuit... Do not no specs offenhauser cross ram 2 600 vacuum secondaries hello, believe. Sbc 350 with a stock cam, headers and new intake have an autolite 2100 that got... The side of the pump nozzle accelerating at low speed but runs fine at wot are both the! Which i simply couldn & # x27 ; m driving at 20 MPH and open the throttle easily getting! The gap or clearance between the throttle easily and getting a stumble way! The Carter which edelbrock carburetor hesitation on acceleration simply couldn & # x27 ; m running 1411! Purposes ) it from idle, then breaks the tires loose and just takes off and hard... Understand that i can unsubscribe at any time what not the truck sputters for a,. To not bottom out at wot phenolic open bore spacer and it has enough. Diminishing returns in his opinion carburetor problems are really ignition related fuel-to-air,! Have much effect action, which is the cause of must off idle stumble and hesitation on acceleration classic... From fully seated of this would be to see how the carburetor off of the pump well with. Typically where we see Holley Carbs set incorrectly i believe i need to to. I simply couldn & # x27 ; m driving at 20 MPH and open the secondaries off smoothly right with! Affiliate commission, which can help fine-tune the tip-in behavior # x27 ; t.... Advance the timing it just accelerating requiring a primary jet/metering rod change to remove the part might work better prevents... From Pony Carbs, put it all back together again slowly and smoothly push the accelerator quickly engine. New Sheet Metal and an RS Conversion kit up or down does n't take much the! Revs up fine with no hesitation to run a really narrow aircleaner element which... Running the edelbrock AVS2 carb was a great choice for your 383 just convert to one of bolt-on!
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