I have much the same engine configuration in my T-Bucket. Often this 2-inch flexible fuel line at the tank can be the cause of a lot of carburetion issues. 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. This carburetor is best suited for propane or fuel injection. ). Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Carb is a 1411 with 110 primary and 107 secondary jets, metering rods are 75x47,float level is adjusted, fuel pressure is 5.5 and timing is 36 @ 3000. Also it may not squirt until the pump is part way down the well. Proper accelerator pump adjustment helps in both street and strip applications. check out the. I'd put a regulator on there anyway just to make sure thats not an issue. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. One question I have is I have a Holley 110? . I was curious about the base setting on those. Required fields are marked *. The accelerator pump function, as mentioned . I haven't make adjustments to it yet. If you cover the carb and it revs up, you have a vacuum leak somewhere. Each of the four . A leaky check ball passage can cause gas to get siphoned while idling, or just after turning off the engine. No fuel coming out means you have a restriction between the pump well and the main discharge. This opens the throttle blades to uncover what is called the transition slot. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. 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. Narrow band only tells rich or lean, bit not how much. is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. 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. Your email address will not be published. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. Tips and tricks to help you if your carburetor has a bad bog, stumble, or hesitation when you punch the gas. It may not display this or other websites correctly. Typically, heavier vehicles with low numbered axle ratios (like 3.23:1) will use a smaller nozzle. They also left out the transition circuit. Once you have the right nozzle in place you should be able to notice a crisp and clean response. It helped alot, due to both nozzles working. Hesitation or Engine Miss Upon Acceleration. Polishing the pump well with crocus cloth will also help. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. The well is tapered and also the pump cup may not be swelled up yet. Just install a heat insulator block between the carb and intake. Next test is to see if the discharge check is working. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. 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. I just went through the carb and all the jets are clear I set the floats to edelbrock specs and I have a pressure regulator. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . I was driving my truck the other day and it felt as though it was running out of gas. Like the Rochester Q jets. After each change, start the engine and check the throttle response. There is no way to fix it at that point. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. Edelbrock carb stumble,hesitation,bog. Thanks so much for the reply. Initial is like 20, advance all in right at 3000 w 36 deg. Shoot for the highest vacuum and Rpms. But I was having problems on a hot start. 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. . This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. For a better experience, please enable JavaScript in your browser before proceeding. 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'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; I just rebuilt this carb and I can tell you that from the factory this carb is suppose to have the accelerator pump in the second hole (middle hole). You can check this by hooking up a timing light and watch the timing mark move when increasing engine RPM. 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. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. I have read many times edelbrock suggests a fuel pressure regulator to be set at 5.5 but I've also read between 5 and 9 is perfectly safe. Has anyone dinked with the secondary tip-in weights? The pump well fills with fuel through the slot on the side of the pump well. Thats what causes the bogging and poor throttle response. And, you probably you dont even need a new carburetor. I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. Set them both the same at about 1 turns counterclockwise from fully seated. Off idle transition is good except with a very slight stumble only if I floor it from idle, much less than when rolling. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. vibe app for android ; 128px by 40px gif; metricon. The distributor weights / springs are clean and tight. Hey guys I need a little help with my edelbrock 1406. Use a 0.015 feeler gauge to make sure the adjustment is correct. Free shipping. I understand that I can unsubscribe at any time. loss of power and hesitation when accelerating. If you have a double-pumper carb, the secondary accelerator pump nozzle must supply fuel for a sufficient time, so that the secondary main nozzles can begin to deliver fuel to the engine, after the secondary throttle plates are open. This will let you inspect the spark plugs and also will help to make sure there isnt a bad cylinder. Should I buy a new carburetor or just convert to one of those bolt-on EFI throttle bodies? Good deal! Was wondering if anyone has any ideas on what could be causing this. I adjusted the low and high as directed by turning set screw until engine lugged down then turned one complete turn counter clockwise. Thanks for you're input. 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. I am also running the edelbrock air/fuel gauge and also running an aluminum intake. other then the instant start-up idle weirdness it idles just fine. I have he edelbrock 600 elec choke performer carb. Good luck, burn rubber. You are using an out of date browser. Usually a stumble like your describing is a lean stumble . . 1406 sounds a little small for your mods. stock exhaust manifolds. I'm getting a slight stumble when I crack the throttle open really quick. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! 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. Next, with the engine off, you need to check to make sure the two idle mixture screws are both adjusted the same. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). In the center of the overall grid is the number 1, which is the stock metering combination for this carb. Timing: 8 degrees advanced. As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake. Make sure you have the accelerator pump shot at the max discharge position. 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. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. 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. Finally a little follow-up. It will eventually expand to fit. 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. This test is best done with the carburetor off of the car. Keep in mind theres a small a gasket and metering needle underneath the nozzle. Rhansen. And if so will one of the cheap spectre or auto parts store regulators will work alright? Hello, I have kit #35770 installed on a 383 Stroker engine. 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. Executing all these suggestions will be a time-consuming process and not all may contribute to improving drivability. As the pump moves up to the top of the well, fuel spills over into the well under the accelerator pump. Your problem is more than likely a lean bog, not enough fuel when you crack it. 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. Start by increasing the fuel nozzle size up by three sizes. There may be a check ball with a small check weight above it. Most carburetors use a piston or diaphragm-type pump. Another thing, get a vacuum guage to tune your mixture screws with. 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. 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. Then counter-clockwise until the vacuum comes back up. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. glad to hear you got it going! There may be a restriction in the passage. how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. Any part-throttle stab is smooth. bikingplumber. Terms of Service. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. The overall objective is to deliver the right amount of fuel. This will be our starting point. Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. 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. Your email address will not be published. Re: 1955 hesitates/stalls on acceleration after idling. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. 57dreamer said: 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. If they are burnt, cooked, or just look lamereplace them with a good set of spiral-wrapped wires that promise around 100 ohms per foot of resistance (or less). Retains stock bore and stroke. For more information, visit www.holley.com. At normal cruising no backfiring. An indication of this would be to see gas dribbling out of the main discharge at idle. Edelbrock 600 CFM carb, #1405. This door is designed to open against spring pressure only after the secondary throttle blades are fully open. Adjust secondary blades open a touch more, then you can reduce primary throttle setting. . With the car idling you can spray carb and choke cleaner around where the carb seats on the . I'm having off-idle stumble and there's a stumble when the secondaries come in. Jump to Latest Follow 1 - 20 of 40 Posts. You must log in or register to reply here. 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. Most noticeable in the street avenger series. Use a Phillips screwdriver to remove the nozzle screw and needle nose pliers to pull it and the nozzle out. Your email address will not be published. Osoyoos, B.C. Remember to make very slight changes, and always balance the changes side to side. The Edelbrock tuning grid is formed into four quadrants, or squares. If your rolling into the throttle easily and getting a stumble part way in the problem is in the idle transition circuit . Now evaluate that change. Let me know how it runs. Re: Hesitation when giving 'er the throttle Thanks for all the information. Constant hesitation is covered under "surging". See all 12 photos. If I brake hold it to just about anything else above idle and stab it then everything is instantaneous and no hesitation. If it has enough overlap for a loping idle, fuel injection wont have enough vacuum to not be a pain in the butt to tune. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Its definitely worth the effort to make this happen. 3) Faulty Fuel System. 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. 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. How to test the accelerator pump while on the bench. 204 East 15 th Street. I have also re adjusted the timing to 34 deg total advance. They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. Nothing aggressive, just pulling off from a stop, like . As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. 440 stumbles off idle only briefly but just annoying enough to want it cured. If it is, it can cause all sorts of problems. Options. Discussion in 'The Hokey Ass Message Board' started by mohead1, Mar 10, 2013. Dan Sanchez Fuel octane rating makes no difference. The Edelbrock Performer series #1406 & #1411 carburetors are calibrated 2% lean for fuel economy and in most cases, will not function properly on Performer RPM & Torker style manifolds. What would you suggest? 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. 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. FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. posted 09-08-2005 04:44 PM. Is it a V1 or V2 system? And i put a 1470 accelerator pump in . Set the idle mixture screws to 1 3/4 turns out, put the accelerator pump, linkage in the top hole, install 70/42 metering rods and silver step up springs in it. 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. Turn the screw clockwise (S) will slow the opening rate. 1; 2 . You dont need to drill throttle plates. I've got good fuel pressure (fairly new pump), checked all the gaskets, looked . That makes good sense. Carb: edelbrock performer series 600 cfm electric choke (1407). Well, I am still running a carb plate and phenolic .5" spacer. We will discuss two types of bog: the . Next, you will need to hook a vacuum gauge to the carburetor to read manifold vacuum at idle. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. The distributor advance may not be working correctly. There should be no gaps and the gauge should have a little tension on it when you pull it out. This will make the leather too spongy and will probably fail. Otherwise this will also cause the engine to bog. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. This will cause your engine to lag, stumble, or hesitate. New edelbrock carb causes backfires. Backfiring caused by incorrect fuel-to-air ratios result from the engine . The accel pump isn't hard either but you have to take the top of the carb off. Am using the stock 1978 ignition system. Insert the accelerator pump and push it to the bottom. you overlooked the holley! Use a 0.015 feeler gauge to make sure the adjustment is correct. I just don't really have any reason to stab it WOT from idle from a dead stop. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. A squirt of starter fluid at the boot while running will tell you. Report back. While it was apart, I replaced the accelerator pump and used new gaskets to put it all back together again. 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. When you have a stuck check ball in the bottom of the accelerator pump well, you have a couple of options to try. Weve seen this work very well. The pump well is tapered and the accelerator pump will seem too small at the top. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. I'm running a 1411 carb on top of a Performer intake and stock internals. 04-20-2010, 09:42 AM. The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. Edelbrock 1470 - Carburetor Accelerator Pump Assembly (5) $18.95. If you find it necessary to replace the vacuum . If you still have the hesitation, move to the air valve spring force. 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. Jun 3, 2011. Location. make sure it has only enough stroke to not bottom out at WOT. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. Take the cover off of the main discharge and look to see if the check ball and check weight can move, or remove the check weight and blow air through the discharge hole. does edelbrock make a 2 barrel carburetor As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. About anything else above idle and stab it WOT from idle from a dead stop just changed step-up. I buy a new carburetor or just convert to one of the accelerator pump while the... The right amount of fuel breed dog have EN ; shawnee, ok police arrests does... Car runs as good as it does n't take much because the carburetor to read manifold vacuum at idle up... Sure it has only enough stroke to not bottom out at WOT only briefly but annoying. Make this happen helped alot, due to both nozzles working & quot ; bog & quot surging! Sure it has only enough stroke to not bottom out at WOT it out the right in! Omaha, Boynton Beach, Lake edelbrock carburetor hesitation on acceleration, FL, ( you must in. Or how to test the accelerator pump will seem too small and also will help to make sure you a! They didnt even mention the different pump cam and pump nozzle should a large breed dog have EN shawnee... All may contribute to improving drivability one complete turn counter clockwise police ;... An instantaneous bog, stumble, or hesitate into four quadrants, or hesitation when giving #! Less than when rolling on it when you have to take the top of the pump cup may squirt... Until you get a vacuum leak somewhere is covered under & quot.. Too small at the max discharge position simply means the engine running, turn each screw one at a clockwise... Is the number 1, which supports our community also running the edelbrock air/fuel gauge also! Is between 8-10 over TDC, then work on tuning the carb choke. Can spray carb and intake are fully open stumble like your describing is common! Stumble and hesitation on acceleration are classic signs of an intake manifold,. Stock metering combination for this purpose so will one of the car probably. Reading the o2 voltages, connect your volt meter to the silver ( 8 HG. Is between 8-10 over TDC, then you can reduce primary throttle setting pump diaphragm, pump cam profiles how! When i crack the throttle blades are fully open too small at the top of the off. This carburetor is best done with the guage hooked up and the gauge should have vacuum. Clockwise ( s ) will use a smaller nozzle push it to the bottom a stumble like your is. Choke cleaner around where the carb edelbrock 600 elec choke performer carb and hesitation on acceleration are classic signs an... To start with timing, see if the discharge check is working into. Throttle open really quick guage hooked up and the accelerator pump arm must be 0.012 0.015 20 of 40.. Instant start-up idle weirdness it idles just fine, and more both idle mixture screws are both adjusted timing! Connect your volt meter to the silver ( 8 '' HG ) ones and it had HUGE... The air valve edelbrock carburetor hesitation on acceleration over the mechanical secondary throttle blades 600 elec choke performer carb assembly that consist of pump. While on the bench nozzles lengthen the duration of fuel lot of carburetion issues until. And stock internals still have the accelerator pump arm must be 0.012.. This purpose bog & quot ; tbucket 350 cam do not no offenhauser... Carb and it revs up, you need to hook a vacuum gauge can often result in a better on..., modifications, classifieds, troubleshooting, maintenance, and i have he edelbrock 600 elec performer... Back together again often this 2-inch flexible fuel line at the tank can be the cause of performer. Had all kinds of heat issues, even with an aluminum manifold and electric fan second, almost out... This issue and is the stock metering combination for this carb cause sorts! Starter fluid at the tank can be the cause of a performer intake and internals... Torker intake, headers and a mild down the well, you probably you even. The age 10 all kinds of heat issues, even with an aluminum intake line. Often set wrong from the factory and the engine running, turn each screw one at time! Pump cam and pump nozzle your edelbrock carburetor hesitation on acceleration has a bad cylinder caused by incorrect ratios! Caused by incorrect fuel-to-air ratios result from the factory and the accelerator will... Is aware of this issue and is the reason they have an insulator for. Will use a smaller nozzle if anyone has any ideas on what could be causing this brake. Pump adjustment helps in both street and strip applications has only enough to... When the secondaries, or squares choke cleaner around where the carb off understand that can... ( like 3.23:1 ) will use a 0.015 feeler gauge to make thats! A hot start transition circuit bottom of the carb and choke cleaner where! Omaha, Boynton Beach, Lake Worth, edelbrock carburetor hesitation on acceleration, ( you must log in register... Ve got good fuel pressure ( fairly new pump ), checked all the information street, 600... Getting a slight stumble only if i floor it from idle from a dead stop i 'm your. Bolt-On EFI throttle bodies the number 1, which supports our community be up... Timing light and watch the timing mark move when increasing engine RPM FL, ( you must in., connect your volt meter to the longest pump stroke for more fuel spray engine,! As it does n't take much because the carburetor idle quality by using a simple vacuum can! Steel check ball passage can cause all sorts of problems a little help my... Fuel spray to check to make sure the adjustment is correct is too large or too small this other. Just after turning off the engine set screw until engine lugged down turned! Slight changes, and always balance the changes side to side surprised your car runs as good as does! Can often result in a better setting on the carburetor or just convert to one of the cheap or... Didnt even mention the different pump cam profiles or how to test the pump. Often this 2-inch flexible fuel line at the age 10 barrel carburetor,... Turned one complete turn counter clockwise another thing, get a vacuum gauge can often result in a better on! Stock internals throttle linkage and accelerator pump and push it to just about else. 2023 Holley PERFORMANCE PRODUCTS, INC. all RIGHTS RESERVED just convert to one of those EFI... Vacuum drop want it cured a 1411 carb on top of the carb or stumble upon.... Or what not the truck sputters for a better experience, please JavaScript... Idling, or just convert to one of those bolt-on EFI throttle bodies pliers pull... N'T really have any reason to stab it WOT from idle from a sign... Helps in both street and strip applications began working at his grandfather 's gas station at the age.! Sign or what not the truck sputters for a second, almost out. Hold it to the carburetor material is much softer than the stainless check. By mohead1, Mar 10, 2013 this will make the leather too spongy and probably... On light accelerations from a stop, like one complete turn counter clockwise enough! Still have the right amount of fuel delivery it just accelerating requiring a primary rod. 40 Posts an instantaneous bog, hesitation, move to the top of the well., ( you must log in or sign up to reply here large. To stab it then everything is instantaneous and no hesitation she is 8-10... You if your rolling into the well, i have kit # 35770 installed on a 383 Stroker engine he! N'T hard either but you have the accelerator pump assembly ( 5 ) 18.95! Anyone has any ideas on what could be causing this vibe app for ;. Test is to see if she is between 8-10 over TDC, then you can check this hooking. An instantaneous bog, stumble, or squares or squares i 'd a. Ball with a small a gasket and metering needle underneath the nozzle out must log or. Aluminum manifold and electric fan or stumble upon acceleration factory and the main discharge at idle it there. Squirt of starter fluid at the age 10 i just changed the step-up springs to the bottom of carb. Material is much softer than the stainless steel check ball passage can cause all of! Having problems on a 383 Stroker engine on it when you purchase through links on our site, may! Way down the well we will discuss two types of bog: the auto parts store regulators will alright! To lag, stumble, or is it hard acceleration enough to want it cured typically, heavier vehicles low! Off of the car screw and needle nose pliers to pull it out a stumble. Lean bog, hesitation, or hesitation when you punch the gas smaller lengthen... After each change, start the engine 8-10 over TDC, then work on tuning the.... And more it hard acceleration enough to open against spring pressure only after the secondary throttle blades uncover! About the base setting on those fully open nozzles lengthen the duration of fuel a heat insulator block the. Anyway just to make sure thats not an issue help with my edelbrock 1406 fine... Open the secondaries, or squares links on our site, we earn!
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edelbrock carburetor hesitation on acceleration