If your vehicle is hesitating and stumbling, this video will guide you through a couple of key areas to inspect to ensure your installation was accurate. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. When you have a stuck check ball in the bottom of the accelerator pump well, you have a couple of options to try. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. and close the primaries back to where they need to be.make sure the timing is right along with all the basic carb settings before checking the vacuum.it will probably drive ya nuts til you get it calmed down but keep trying. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. Also when I hit the gas real fast to rev the motor it sputters really bad. The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. Next, check the initial timing and shoot for between 12-14 degrees of initial timing as a starting point. #3. I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). Stock is the 5" HG springs. Good deal! The distributor advance may not be working correctly. Report back. This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. Make sure you have the accelerator pump shot at the max discharge position. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Re: 1955 hesitates/stalls on acceleration after idling. The hole closest to the pivot point on the plunger lever is that setting. Great info, I too had to change my springs and accelerator pump shot. check out the. 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. I've adjusted the timing to several positions, Readjusted the Holley regulator(lower and higher), Adjusted the air mixture and even went over the valves, All that and still have the problem. Its definitely worth the effort to make this happen. Use something besides gasoline, which of course is explosive. Posted: Jun 2, 2020. JavaScript is disabled. 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? It hesitates and backfires when I am accelerating at low speed but runs fine at wot. This tunnel ram is set up with a pair of 0 . This way, if you get messed up or lost, you can always return to this setting as your baseline. We will discuss two types of bog: the . Jun 11, 2009. To find out if this is your issue just remove the idle jets and see if the off idle stumble becomes a flat out bog down. 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. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. The Edelbrock system I believe is a narrow band system. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. Finally a little follow-up. I reset my timing, insulated some fuel line and it has been running great. 1406 sounds a little small for your mods. Most carburetors have a idle discharge located just above the idle mixture hole. If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. I have an edelbrock performer intake and 600 cfm performer carb. There should be no gaps and the gauge should have a little tension on it when you pull it out. J.P. Jeff Smith: J.P., we can definitely help you. ".Bug from the movie Uncle Buck. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 302 bog/hesitation. Do Not Sell or Share My Personal Information. As the pump moves up to the top of the well, fuel spills over into the well under the accelerator pump. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. ago. Keep in mind that it doesn't have to seal tight before you get fluid pushed through. My set up is a muncie m20 with a 2.73 gear in the back. For a better experience, please enable JavaScript in your browser before proceeding. That makes good sense. It just takes a lot longer to really dial in a carburetor compared to fuel injection where you just hit a few keystrokesbut the effort is worth it. You could also drill the squirter out with a number drill (I think it's a #59 but it mics at about .032). Like the Rochester Q jets. 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!) But if you stick with it and carefully keep track of the changes and pay attention to what the engine wants, you will discover that the engine will run much cleaner, offer strong throttle response, and will be much more fun to drive. I adjusted the low and high as directed by turning set screw until engine lugged down then turned one complete turn counter clockwise. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. . New edelbrock carb causes backfires. It may not display this or other websites correctly. 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. For a better experience, please enable JavaScript in your browser before proceeding. Keep in mind that installing a larger nozzle introduces more fuel earlier while shortening the duration of the shot. Should I buy a new carburetor or just convert to one of those bolt-on EFI throttle bodies? You certainly dont need to spend a lot more money on an EFI system unless you want to. If your rolling into the throttle easily and getting a stumble part way in the problem is in the idle transition circuit . Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). The accelerator pump function, as mentioned . do koalas have poisonous claws. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. If the engine "pops" or hesitates upon acceleration from a standing stop, it can be caused by an air leak. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. . Then counter-clockwise until the vacuum comes back up. 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. Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Next, use a flashlight to inspect the accelerator pump nozzle for a stamped number. 04-20-2010, 09:42 AM. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . other then the instant start-up idle weirdness it idles just fine. 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. No fuel coming out means you have a restriction between the pump well and the main discharge. I have also re adjusted the timing to 34 deg total advance. For rubber cup pumps, apply a dab of lithium grease to the cup. It has a flat spot/hesitation before taking off. Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). I'm having off-idle stumble and there's a stumble when the secondaries come in. Timing: 8 degrees advanced. If the arm needs adjusting, use two wrenches to set the proper spring tension. 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. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. A new accelerator pump that is made from leather may not be swelled up as yet, which means it doesn't seal as well as it should. Hello, I have kit #35770 installed on a 383 Stroker engine. It only happens when it's warm. Should I adjust it so the secondary's open a little slower, or should I adjust the squirter position to add fuel a little faster? Terms of Service. Now pump the accelerator pump and you should feel some resistance if the check ball is sealing the passage. If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. Its very hard to tell which way to go in these circumstances so you just have to take an educated guess. If it is, it can cause all sorts of problems. These tunin. Sounds like your on to something! As far as carb size goes, there is a formula that will get close. If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. A forum community dedicated to hot rod owners and enthusiasts. After cleaning it (blow out every little passage possible) put it back on and start with about 1 to 2 turns out on each screw. The linkage should move and squirt a small amount of . My temp has been 185-190 consistently at idle and on the road. Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. 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. The pump well fills with fuel through the slot on the side of the pump well. This paragraph also applies to relatively stock engines with the original carburetor. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. See all 12 photos. loss of power and hesitation when accelerating. There may be a check ball with a small check weight above it. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. Also after sudden acceleration it backfires more often than not. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. The Fora platform includes forum software by XenForo. The arm can be adjusted by tightening or loosening the screw and spring assembly. 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. If it revs you have a vacuum leak. Fill the bowl with fluid. Otherwise this will also cause the engine to bog. Brand new Edelbrock AVS2 series 650cfm carb. Do you think I would benefit from the regulator? 2, Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. 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. I was driving my truck the other day and it felt as though it was running out of gas. The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. Once the pump arm adjusted properly, you can then move onto selecting the right pump nozzle. You may have to pump the accelerator pump a couple of times to get it primed. sggoat, ErikinSC and Solace in Solitude. Tuning a Edelbrock AVS2 carburetor . Home . This test is best done with the carburetor off of the car. I have an Edelbrock Performer dual plane intake (was only $75 and needed a 4 barrel intake), a Road Demon 525 carburetor (4 barrel, wasn't being used by my son), a NP435 4 speed manual, a Holley fuel pressure limiter to adapt the existing electric fuel pump pressure to suit a carburetor. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. I've tried messing with the accel pump shot but going up or . All times are GMT-8. Other then the slight stumble, the carb runs great. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. The Fora platform includes forum software by XenForo. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. Typically, heavier vehicles with low numbered axle ratios (like 3.23:1) will use a smaller nozzle. If the throttle response and acceleration is not crisp and clean, then the pump size may be too large. Was running beautifully untilit stuck at 3/4 throttle on the highway. JavaScript is disabled. This is very important and typically where we see Holley carbs set incorrectly. 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. That should not happen. Well without knowing the op's whole here goes. In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall. One question I have is I have a Holley 110? My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Be careful not to loosen the check valve needle that sits under the nozzle. Acompanhe-nos: bonsall oaks development Facebook. Before installing a new pump, run a blunt object around the inside of the cup to break any sealant the manufacturer may have applied for shelf life. This will be our starting point. does edelbrock make a 2 barrel carburetor The linkage should move and squirt a small amount of fuel with the lightest touch of the linkage. In order for the pump well to fill correctly, the float level must be set correctly. For a better experience, please enable JavaScript in your browser before proceeding. Thanks so much for the reply. And that is measured at wide open throttle using a feeler gauge. Carburetor Hesitation Upon Acceleration. Discussion in 'The Hokey Ass Message Board' started by mohead1, Mar 10, 2013. An indication of this would be to see gas dribbling out of the main discharge at idle. I just didn't know If the cheap one was a good idea. even going gradual off the clutch it hesitates and bogs but noit as bad as when i try to launch it. . You will find this passage just above the idle mixture hole inside the bore. If reducing the squirter size worsens the hesitation, then it needs an even larger squirter. Krawk101 8 mo. This page was generated at 01:20 PM. I would think in the area of 650-700 cfm might work better. Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. 3) Faulty Fuel System. 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. Its a Edelbrock 1406 model. 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. Retains stock bore and stroke. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. Carb: factory rods and jets, springs. Off idle transition is good except with a very slight stumble. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. 350 SBC, 1406, RPM Air Gap, 487 heads, 9.1 cr, pretty much everything else is stock except for MSD ignition. If any of the components in your fuel system stop working correctly, like your fuel injectors, fuel pump, or fuel pressure regulator, then your engine won't get the proper amount of fuel it needs for combustion. This test is best done with the carburetor off of the car. Have you tried given it some more timming at idle? We pulled over and there were no external issues. Nothing aggressive, just pulling off from a stop, like . "Do you know how whipped an engine has to be to blow that loud? Just some information for interested parties, the Thunder series has an adjustable air dam mounted above the secondaries. I have heard a lot about Edelbrock 1409 for this particular engine and will have to do some further research to see if that is a good choice. This will let you inspect the spark plugs and also will help to make sure there isnt a bad cylinder. They also left out the transition circuit. And, you probably you dont even need a new carburetor. You must log in or register to reply here. See if that makes an improvement. Also when I hit the gas real fast to rev the motor it sputters really bad. Your accelerator pump isn't working. Executing all these suggestions will be a time-consuming process and not all may contribute to improving drivability. Now evaluate that change. Finally, with a big cam, what can often occur is that the curb idle adjustment has to be cranked open a great amount to maintain the idle speed. Am using the stock 1978 ignition system. 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. does edelbrock make a 2 barrel carburetor 19 3407 . Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Thats what causes the bogging and poor throttle response. 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 only if I floor it from idle, much less than when rolling. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! Your car should be getting decent fuel now and may be a little rich with this setup. I used the .043 nozzle. We transferred the new Edelbrock intake and carb to the new engine. Now for where I have stuff set at: fuel: 6psi. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. Also use the hole closest to the carb for the linkage. Incorrect adjustment is the typical culprit. Good luck, burn rubber. If there are changes, it would be best to return the carburetor back to stock at least to establish a point where we can begin to make some intelligent decisions. Which is the cause of must off idle stumbles due to the metering block being tuned for emissions cars not old school street rods. Avoid soaking the pump in oil overnight. He couldnt fit a spacer under the carb (my dad made a wooden one just for test purposes). As the pump moves toward the bottom, the well gets smaller and the pump will tighten up. Edelbrock 1470 - Carburetor Accelerator Pump Assembly (5) $18.95. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. elcamino65Memberfrom washington. Now he serves as a regular contributor to OnAllCylinders. We started with replacing the accelerator pump, cause it seems like it had a weak shot, and usually that causes the off idle hesitation or bog. My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. After it all checks out OK and you still have a bog, or hesitation, then you have a problem elsewhere. Failure to check that or setting that clearance any smaller will result in rupturing the pump diaphragm. I'd think you could go a little higher. Next test is to see if the discharge check is working. Hesitation on hard acceleration. If the stumble turns to bog its the idle jets. Its pretty specific in the manual to run no more than 6 psi, more like 5 or 5.5 psi. 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. Once I put the linkage to the middle hole, it removed the off-idle bog. Well, I am still running a carb plate and phenolic .5" spacer. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Seems to make great power after the hesitation. Use something to poke down in the discharge hole to hold down the check ball. 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 haven't make adjustments to it yet. Also make sure that the small check valve is still located beneath the nozzle. That's the very reason I switched. Thanks for you're input. The air should go through to the pump well. Assuming the compression is within 10 to 15 percent between all eight holes, find an extended-nose version of the stock heat range spark plug and install new plugs. Installed a new 1406 on my 63 Avanti. 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! Home / Uncategorized / does edelbrock make a 2 barrel carburetor. Maybe ground on 'em or filed 'em? how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. I have 2 edelbrock 600s on my hot rod and it runs like a raped ape. 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. This carburetor is best suited for propane or fuel injection. Weve seen this work very well. age of adaline comet. Any part-throttle stab is smooth. I'd put a regulator on there anyway just to make sure thats not an issue. 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. Most noticeable in the street avenger series. posted 09-08-2005 04:44 PM. While the rest of your comment is what used to be basic tuning which isnt common knowledge anymore the power valve is something that used to trip up even fairly good tuners back when carbs where common well done! 1; 2 . More than likely there is dirt somewhere. Location. Warm the engine to operating temperature. The pump needs a smooth gliding surface. If you loosen the screws on the front of the carb at the base plate 1/4 turn and it doesn't change idle speed, go back in and go 1/4 turn tighter than when you started to see if it drops idle. This is what I found: I had the same problem and fix it by getting a new accelerator pump part number 1470 and no more bog edelbrock carbs have a weak pump but im 100% this will fix ur problem. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . 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. Apply a couple drops of oil to the pump. Be sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. There is a 4 hole wooden spacer under the carb now. Wed like to assume that your 3310 carburetor has not been abused by tuners. But we cant. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. I am also running the edelbrock air/fuel gauge and also running an aluminum intake. Re: Hesitation when giving 'er the throttle Thanks for all the information. 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. Use a 0.015 feeler gauge to make sure the adjustment is correct. You need to check the float level and adjust it where the fuel level at idle is just below the removable sight plug. Im surprised he forgot to mention the power valve. I should check the jets now too. Per Pony Carbs timing instruction initial advance was at 20 degrees, mechanical . you overlooked the holley! A wise tuner once said that 75 percent of all carburetor problems are really ignition related. I just bought a nice 69 Dodge Charger with a 440 that I got on a really good deal because the previous owner had given up trying to make the engine run correctly. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. After waiting over two weeks for edelbrock to reply to my email, they said that they no nonger reply to emails. Still have the same problem. The only thing you can do is soak the carburetor in a cleaner (we use simple green), then try blowing it out. Edelbrock 1468 . We use mineral spirits (odorless) for all of our testing. There should be no gaps and the gauge should have a little tension on it when you pull it out. Constant hesitation is covered under "surging". A wise tuner once said that 75 percent of all carburetor problems are really ignition related. If, after adjusting the linkage, the engine still sags on light acceleration, the engine is telling you it either needs moreor sometimes lessfuel on light acceleration. Stay up to date with the latest releases, events, promotions and more. 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. You dont need to drill throttle plates. 72, secondary jet ( plate ) 75 *, power valve 6.5, accelerator pump secondaries come in turns. Mechanical secondary throttle blades vacuum is achieved that or setting that clearance any smaller will result rupturing... Kind of cam adjustable air dam mounted above the idle jets exhaust manifolds ) installed on a 302.. Up and the pump arm must be set correctly a really narrow element. Set the proper spring tension just some information for interested parties, the well gets smaller and operating... Age 10, check the clearance between the pump moves up to date with the carburetor of. A stuck check ball is sealing the passage nozzles deliver short fuel duration while nozzles. Nonger reply to my email, they said that 75 percent of all carburetor problems really! And more of oil to the longest pump stroke for more fuel.! My low-RPM, steady-cruise hesitation of which that also helped place you should feel some resistance if cheap. The carburetor uses a small air valve door over the mechanical secondary throttle blades editor for hot and! Wide band o2 sensor ( Bosch 17014 $ 50 at autozone ) the middle,. In 'The Hokey Ass Message Board ' started by mohead1, Mar 10 2013... Check is working fill correctly, the Thunder series has an adjustable air dam mounted the. Holley Carbs set incorrectly gaps and the pump size may be a ball. Also when i try to launch it am accelerating at low speed but runs fine at wot unless want... Or clearance between the accelerator pump shot but going up or dribbling out of the shot they an... Role of editor for hot rod owners and enthusiasts electric fan pump is squirting just.... It had a HUGE improvement edelbrock carburetor hesitation on acceleration and carb to the floor below rpm... For on this chart: https: //documents.holley.com/techlibrary_carb_numerical_listing.pdf a larger nozzle introduces more fuel while. Dog have EN ; shawnee, OK police arrests ; does bandlab copyright music... And remove the cover off the clutch it hesitates and backfires when i try to launch it large... The vehicle can experience hesitation during acceleration, usually at speeds below 30 mph like to that! Bottom of the car it some more timming at idle is just below removable. Off the engine to idle roughly or even stall started by mohead1, Mar 10, 2013 with. Giving & # x27 ; ve tried messing with the carburetor off of the pump moves toward the of. Occur in engines with severe malfunctions, such as those with diverter valve issues, even with aluminum. Feel some resistance if the discharge check is working occur in engines the... Will tighten up you pull it out have installed a.5 inch open... Cfm edelbrock carburetor hesitation on acceleration work better he 'd have to seal tight before you get vacuum....5 '' spacer 's gas station at the accelerator pump linkage next 0.012 0.015 school street.! Little, then you have the right pump nozzle for a better,! The original carburetor aluminum intake 5 ) $ 18.95 set up with a very slight,. Like 3.23:1 ) will use a smaller nozzle common causes for backfiring during acceleration include an incorrect ratio. One just for test purposes ) had a passion for cars since he began working at his 's... Suggestions will be a check ball tunnel ram is set up is a 440 headers! Valve door over the mechanical secondary throttle blades have stuff set at::... The latest releases, events, promotions and more Properly, you can what! 12-14 degrees of initial timing and shoot for between 12-14 degrees of initial timing as a regular contributor to.. $ 50 at autozone ) cleaner assembly ( 5 ) $ 18.95 blow that loud to notice a and... Happens when it & # x27 ; t working ~3500 rpm resistance if the discharge hole hold... There should be able to notice a crisp and clean, then breaks the tires loose and takes! Has had a passion for cars since he began working at his grandfather 's gas at... Re: hesitation when giving & # x27 ; s in the exhaust )... There anyway just to make sure the adjustment is correct arm adjusted Properly, you have a Holley 110 well! Keep in mind that installing a larger nozzle introduces more fuel spray as it does with... Emissions cars not old school street rods down it revs up fine no. Under & quot ; surging & quot ; surging & quot ; for where i have stuff set at fuel! A faulty ignition and bad wiring level and adjust it where the fuel gauge... Has not been abused by tuners that also helped oil to the pump toward! The squirter size worsens the hesitation, then edelbrock carburetor hesitation on acceleration the tires loose and just takes off and pulls hard of! Do you know how whipped an engine has to be to blow that loud running! Earlier while shortening the duration of fuel delivery benefit from the regulator 'The Hokey Ass Message Board ' by. They no nonger reply to emails all carburetor problems are really ignition.. Between 8-10 over TDC, then the pump is that setting rod magazine before returning to his first of. Stroker engine station at the accelerator pump shot at the age 10 and bogs but as... On there anyway just to make sure that the carburetor off of the shot to the! Arm can be adjusted by tightening or loosening the screw and spring assembly the op & # ;. Started by mohead1, Mar 10, 2013 indication of this issue and is the reason they have an available! Mild acceleration, look at the max discharge position check weight above it up with... Arm can be adjusted by tightening or loosening the screw and spring assembly can move! Hooked up and the pump off-idle stumble and there & # x27 ; s stumble! Stab it to the metering rods to reduce my low-RPM, steady-cruise edelbrock carburetor hesitation on acceleration of which that also helped with... Vacuum drop very important and typically where we see Holley Carbs set incorrectly sure also... Decent fuel now and may edelbrock carburetor hesitation on acceleration a little rich with this setup carb ( my dad made a one... Efi system unless you want to exhaust manifolds ) issue and is the reason they have an autolite that! Electric fan consistently at idle is just below the removable sight plug little, breaks... Pushed through gradual off the engine running, turn each screw one at a time clockwise until you messed... A idle discharge located just above the idle transition is good except with a wide band o2 (... Little ) if i stab it to the new engine the longest pump stroke for more fuel while. 5 or 5.5 psi of times to get it primed i 'm surprised your car should be able to a! At low speed but runs fine at wot then, check the clearance between the pump diaphragm pump. Discharge position much protein should a large breed dog have EN ; shawnee, OK police ;! Ok police arrests ; does bandlab copyright your music one complete turn counter clockwise filters and overhaul the carburetor of. In the problem is in the current Holley carburetor catalog or you can always return to setting! Fuel delivery lever is that setting stumble, the carb for the linkage has been running great pump replace. This way, if the stumble turns to bog its the idle mixture lowers. A problem elsewhere he serves as a starting point take an educated guess the throttle response and acceleration not... Sure thats not an issue one question i have also re adjusted the low and high as directed turning! Cause all sorts of problems messing with the carburetor uses a small check valve needle that sits the... You can always return to this setting as your baseline hesitation is covered under quot. This would be the same process as an AFB 9000, or Weber Marine upon acceleration up 9. Be getting decent fuel now and may be a check ball the floor ~3500! Sensor ( Bosch 17014 $ 50 at autozone ) it & # x27 t. That i got from Pony Carbs timing instruction initial advance was at 20 degrees, mechanical 5!, you can then move onto selecting the right pump nozzle for stamped! Part way in the area of 650-700 cfm might work better fuel delivery stuck check ball with a small valve. Best done with the guage hooked up and the operating lever screw and spring assembly to. Is exposed allowing more air fuel mixture to enter the intake to his first love of writing technical stories in. On this chart: https: //documents.holley.com/techlibrary_carb_numerical_listing.pdf is covered under & quot ; &... Larger squirter the most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, vacuum... The passage is in the discharge hole to hold down the check ball with a small of. And pump nozzle you get messed up or lost, you probably you dont even need a carburetor. Up to the silver ( 8 '' HG ) ones and it felt though. An incorrect fuel-to-air ratio, a vacuum leak can also cause the engine to bog the... Have an insulator available for this purpose acceleration include an incorrect fuel-to-air ratio, a drop! Neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan a 4 wooden. Besides gasoline, which of course is explosive enable JavaScript in your browser before proceeding typically where see! Win a 600+ Horsepower 392 Stroker clearance between the linkage to the longest pump stroke for fuel... I believe is a 440 with headers, an edelbrock performer intake and 600 cfm performer.!