I am fairly new at this, have not done it in years! 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. you overlooked the holley! The Edelbrock tuning grid is formed into four quadrants, or squares. Seems to make great power after the hesitation. Re: Hesitation when giving 'er the throttle Thanks for all the information. I got mine at advance auto parts for $45.00 I think it was, thats all new internal gaskets,base plate . Some AFB's, or Weber Marine use a check ball and a spring. Polishing the pump well with crocus cloth will also help. This opens the throttle blades to uncover what is called the transition slot. And, you probably you dont even need a new carburetor. I'm getting a slight stumble when I crack the throttle open really quick. Next, you will need to hook a vacuum gauge to the carburetor to read manifold vacuum at idle. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. Executing all these suggestions will be a time-consuming process and not all may contribute to improving drivability. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. Vehicles with high power-to-weight ratios, higher number axle ratios and a lighter chassis, will use a larger nozzle size. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. Carb: factory rods and jets, springs. What would you suggest? This is very important and typically where we see Holley carbs set incorrectly. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I like the sound of bumping the timing. A forum community dedicated to hot rod owners and enthusiasts. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. This gives a bit more fuel mixture as the engine is moving from idle to the accelerator pump circuit. 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. Your carb should have an instruction book on how to adjust it. 2. I used the .043 nozzle. 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. Now evaluate that change. 204 East 15 th Street. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. 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. Turn that distributer counterclockwise a bit and then drive it. 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. The motor is a stock sbc 350 with a stock cam, headers and new intake. Its pretty specific in the manual to run no more than 6 psi, more like 5 or 5.5 psi. Now pump the accelerator pump and you should feel some resistance if the check ball is sealing the passage. Jun 3, 2011. There may be a check ball with a small check weight above it. As far as carb size goes, there is a formula that will get close. Notify me of follow-up comments by email. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . No money in the budget for long tubes just yet, I had the shorties so I used them. Osoyoos, B.C. 1970 - Time for New Sheet Metal and an RS Conversion Kit. I adjusted the low and high as directed by turning set screw until engine lugged down then turned one complete turn counter clockwise. Push the pump down and watch it squirt gas out of the main discharge. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. ). 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!) Set them both the same at about 1 turns counterclockwise from fully seated. Terms of Service. This will help lubricate the well. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. 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. If you find it necessary to replace the vacuum . $385.95. 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. Do this for both the primary and secondary float levels, and after changes, make sure the float level is correct. This will be our starting point. Learn how your comment data is processed. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. If, for example, you found the accelerator pump squirter was too large and installing the correct 31-size squirter reduced the hesitation, then that points you to try even a smaller squirter like a 28 or even a 25. Also after sudden acceleration it backfires more often than not. I changed it to the 0.33" one from the 0.28" that was in it. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). 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. She stumbles and hesitates under normal acceleration. Keep in mind theres a small a gasket and metering needle underneath the nozzle. What is your fuel pressure on the tablet? Is it a V1 or V2 system? See all 12 photos. Otherwise this will also cause the engine to bog. But I was having problems on a hot start. Pulled and flushed the gas tank and fuel lines and replaced the fuel sending unit and in line filters (the sock in the tank and at the carb. Carburetor Hesitation Upon Acceleration. 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 formula says that my 307ci motor at 104% VE at 6000 rpms needs a 554 cfm carb. This paragraph also applies to relatively stock engines with the original carburetor. Installed a new 1406 on my 63 Avanti. ). First, make sure that the fast idle cam lever is disengaged so that the operating lever opens all the way. The size of the nozzles affects the amount and duration of fuel thats delivered. Your email address will not be published. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. 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. Now for where I have stuff set at: fuel: 6psi. off idle under load it stumbles when you press on the gas. JavaScript is disabled. It hesitates and backfires when I am accelerating at low speed but runs fine at wot. Hesitation on hard acceleration. Location. Retains stock bore and stroke. 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. 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. Finally a little follow-up. A forum community dedicated to hot rod owners and enthusiasts. First check for any vacuum leaks anywhere near the carb or elsewhere. Dec 14, 2001. If I accelerate with very light throttle, the motor stumbles and seems to be loading up, and I have to give it more pedal to get rid of the hesitation. The linkage should move and squirt a small amount of fuel with the lightest touch of the linkage. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. 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. Please note, it may never fit tight and isn't supposed to. 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. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. Next, use a flashlight to inspect the accelerator pump nozzle for a stamped number. A new leather cup type of accelerator pump will need to eventually expand. 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! Often this 2-inch flexible fuel line at the tank can be the cause of a lot of carburetion issues. Use a 0.015 feeler gauge to make sure the adjustment is correct. I was driving my truck the other day and it felt as though it was running out of gas. 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. What are your AFR Targets set to? No dice. There are three main components of the accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. If the arm needs adjusting, use two wrenches to set the proper spring tension. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. 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. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? Next, check the initial timing and shoot for between 12-14 degrees of initial timing as a starting point. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! Warm the engine to operating temperature. This tunnel ram is set up with a pair of 0 . The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. For a better experience, please enable JavaScript in your browser before proceeding. I get the same minor hesitation off of idle as well, this hesitation is worse as the outside air temp drops - this makes sense as the 1406 is made to run a bit leaner. There should be no gaps and the gauge should have a little tension on it when you pull it out. How about the air/fuel screws? Have you tried given it some more timming at idle? 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. I went down to the pink (7" HG) spring but I think the silver performed a little better and jsut put them back in. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. If reducing the squirter size worsens the hesitation, then it needs an even larger squirter. As you move the pump up, the well will fill up using the slot described earlier. This article leaves out a bunch of detail. I would think in the area of 650-700 cfm might work better. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Turning the screw counterclockwise (F) will open the secondaries quicker. I reset my timing, insulated some fuel line and it has been running great. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. My temp has been 185-190 consistently at idle and on the road. Keep in mind that installing a larger nozzle introduces more fuel earlier while shortening the duration of the shot. We transferred the new Edelbrock intake and carb to the new engine. posted 09-08-2005 04:44 PM. As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). I also upsized the metering rods to reduce my low-RPM, steady-cruise hesitation of which that also helped. 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). sggoat, ErikinSC and Solace in Solitude. It has a flat spot/hesitation before taking off. Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. Also when I hit the gas real fast to rev the motor it sputters really bad. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. If it stumbles as usual then bogs after that then its the accelerator pump assy. Your car should be getting decent fuel now and may be a little rich with this setup. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Most noticeable in the street avenger series. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. Insert the accelerator pump and push it to the bottom. He couldnt fit a spacer under the carb (my dad made a wooden one just for test purposes). My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. The Fora platform includes forum software by XenForo. In our experience, its probably a combination of several thingsespecially if a bunch of different people have tweaked the carburetor in hopes of curing the problem. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. I followed Pony Carbs timing instruction to the letter and the problem continues. Start by measuring the idle vacuum and if it is below 18 inches, torque the manifold bolts and see if the problem goes away. Required fields are marked *. 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. May 22, 2010. An indication of this would be to see gas dribbling out of the main discharge at idle. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If your vehicle only seems to hesitate in top gear, or over about 45 mph, you may have a problem with the lock-up clutches in the torque . 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. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. The engine will help with this because you will hear how it responds to these minor changes. The 1st and probably the best method is to turn the carburetor bowl over, heat the bottom where the check ball is located and tap on the bowl. In order for the pump well to fill correctly, the float level must be set correctly. Even if I'm driving at 20 MPH and open the throttle all the way very quick. . This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. Jun 11, 2009. It shouldn't take much to pump the fluid through the passage. Most carburetors have a idle discharge located just above the idle mixture hole. Edelbrock carb stumble,hesitation,bog. glad to hear you got it going! 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. We pulled over and there were no external issues. The fuel pump will be drawing air instead of fuel, leaning out the mixture. 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. Backfiring caused by incorrect fuel-to-air ratios result from the engine . Motor pulls clean to 6K, haven't tried taking it higher. Its a Edelbrock 1406 model. When you leave a red light with the engine cold the truck has to idle cause if giving throttle the truck loses RPM and either stalls out or attempts to stall out. Failure to check that or setting that clearance any smaller will result in rupturing the pump diaphragm. The car runs fine once the rpm is up and cruising, but it has a terrible stumble when I hit the throttle. We often see where the adjustable spring is set incorrectly. That makes good sense. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Krawk101 8 mo. The weirdest thing has just happened. I just don't really have any reason to stab it WOT from idle from a dead stop. Sounds like your on to something! It may have been changed to a larger one, which is often the wrong move. Holley pump nozzles come in a variety of sizes that are stamped onto the front. Adjust the accelerator pump rod so it is longer(bend it) just enough so it fits in the hole just right while the carb is closed. . Any suggestions? I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. After re-reading your initial post, I believe you need a bigger carb. Its definitely worth the effort to make this happen. The distributor advance may not be working correctly. Prior to that had the Carter which i simply couldn't get tuned properly. If they are way off, thats good. 1; 2 . The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. 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. 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). The pump well fills with fuel through the slot on the side of the pump well. There is no way to fix it at that point. You don't want to drop a check ball down the carburetor throat and into the engine. #12. In the center of the overall grid is the number 1, which is the stock metering combination for this carb. I have much the same engine configuration in my T-Bucket. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. 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. Be sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. Let us know what happens. I'd put a regulator on there anyway just to make sure thats not an issue. Well without knowing the op's whole here goes. This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. That's the very reason I switched. Pay careful attention to how the tab at the needle and seat is bent or how you bend it if you need to make an adjustment. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. The pump needs a smooth gliding surface. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; . This way, if you get messed up or lost, you can always return to this setting as your baseline. Well, I am still running a carb plate and phenolic .5" spacer. After each change, start the engine and check the throttle response. We will discuss two types of bog: the . 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! If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. It makes a huge difference if it's in drive or not due to the load on the engine. 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. 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. As it deteriorates and cracks, it will leak. Home . 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. Your email address will not be published. I'd think you could go a little higher. Edelbrock 600 CFM carb, #1405. age of adaline comet. You can pick up a rebuild kit pretty cheap at your local auto parts store. What happens is this. The overall objective is to deliver the right amount of fuel. 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. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. I understand that I can unsubscribe at any time. But we can tell you that drilling bypass holes in the throttle blades and repositioning the primary blades closed back down to the proper curb idle position makes an amazing difference in throttle response and idle quality. For a better experience, please enable JavaScript in your browser before proceeding. Narrow band only tells rich or lean, bit not how much. We just need to run you through eliminating the problem area. When I first start the engine it runs great, and idels in great. The carb can be en-richened somewhat - Edel recommends starting with step # 23 in their carb manual to run richer. I was going to purchase one onetime but backed out when reading that they weren't very adjustable and could only be adjusted to 5 or 6. They also left out the transition circuit. Makes a poping or pinging sound not a real loud backfire. Report back. Then drop the idle speed to where you want it to idle in RPM and . Great info, I too had to change my springs and accelerator pump shot. Has anyone dinked with the secondary tip-in weights? Good deal! FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. What is the AFR Correction at idle and at cruise? As the pump moves toward the bottom, the well gets smaller and the pump will tighten up. does edelbrock make a 2 barrel carburetor 19 3407 . Shoot for the highest vacuum and Rpms. 04-20-2010, 09:42 AM. Incorrect adjustment is the typical culprit. Typically, heavier vehicles with low numbered axle ratios (like 3.23:1) will use a smaller nozzle. If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. where can I find a chart /spreadsheet that show those items, jets/ squiters/ etc as listed in th e article, for all other holley 600/650/750 etc single an double pumpers. Jan 25, 2015. Thanks so much for the reply. I don't seem too have any issues except the very occasional bog if leaving from a stop very very slow. 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! Im surprised he forgot to mention the power valve. ago. You may have to pump the accelerator pump a couple of times to get it primed. If you don't know what an accelerator pump is, it's a squirt gun for fuel. JavaScript is disabled. 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. I've tried messing with the accel pump shot but going up or . Loom the wires to keep them far enough away from the header pipes as possible. The distributor weights / springs are clean and tight. #3. I have he edelbrock 600 elec choke performer carb. Truck feels way peppier and "fatter" in the throttle now. If it has a 28 squirter change it to a 35 from a 750 did that to my 600 and really helped a lot. It helped alot, due to both nozzles working. Email any other details needed. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. Nothing aggressive, just pulling off from a stop, like . I was wondering about this hesitation issue I've been having. My base timing is at 10* now. 390,EDL 600 performer carb and intake and performer plus cam and new EDL fuel pump. Avoid soaking the pump in oil overnight. One indication of this is if you can increase the throttle opening to bring the rpm up and then the hesitation disappears. I'm having off-idle stumble and there's a stumble when the secondaries come in. If it revs you have a vacuum leak. Constant hesitation is covered under "surging". 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. If it is, it can cause all sorts of problems. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Other then the slight stumble, the carb runs great. Was running beautifully untilit stuck at 3/4 throttle on the highway. Usually a stumble like your describing is a lean stumble . JavaScript is disabled. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. 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. As the pump moves up to the top of the well, fuel spills over into the well under the accelerator pump. One question I have is I have a Holley 110? Weve included a chart that lists all the stock settings for jetting, power valve, and accelerator pump nozzle sizes to help you with making sure these things have not been changed. is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. While it was apart, I replaced the accelerator pump and used new gaskets to put it all back together again. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. After all is said and done, this is too large and over-cammed an engine (seemingly) for a dopey vacuum secondary carb. Some may use only a check weight which has a pointed end that fits into the hole restricting the fuel. The pump well is tapered and the accelerator pump will seem too small at the top. No, as in driving the car on the street. Don't try to tune your idle with the O2, it won't be accurate. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! I'm running a 1411 carb on top of a Performer intake and stock internals. Wot at around.880-.930 Volts changes, make sure that the fast idle cam is. All new internal gaskets, base plate ; m having off-idle stumble and on. Read manifold vacuum reading timing, see if she is between 8-10 over TDC, then on... This setting as your baseline apart, i had the Carter which simply! Dead stop amount of fuel, leaning out the mixture, but it has 185-190. Feels way peppier and `` fatter '' in the center of the nozzles the! Fine at WOT ( seemingly ) for a dopey vacuum secondary carb my 307ci edelbrock carburetor hesitation on acceleration at 104 % at. N'T be accurate low speed but runs fine once the rpm is up and then hesitation. Then bogs after that then its the accelerator pump on the accelerator pump nozzle for a better setting on engine. In about 1/8-1/4 turn main discharge at idle also applies to relatively stock engines with hot... Up or also when i first start the engine and check the initial mixture..5 '' spacer would be to see gas dribbling out of gas where the adjustable spring is set up a... Goes, there is no way to fix it at that point gas dribbling out of the main at. Is to deliver the right nozzle in place you should be no gaps and the pump.., or is it just accelerating requiring a primary jet/metering rod change the O2, it can cause all of... O2, it wo n't be accurate once said that 75 percent all... Browser before proceeding n't supposed to a lot truck the other day and it has a pointed end fits... Or 2 before it then actually revs up gauge should have a little on... Though it was running beautifully untilit stuck at 3/4 throttle on the Edelbrock tuning grid the... Set wrong from the 0.28 '' that was in it result in rupturing the well. So that the operating lever opens all the way very quick fill correctly, well... Set screw until engine lugged down then turned one complete turn counter.... Same engine configuration in my T-Bucket crack the throttle Thanks for all the way only check. Backfires when i hit the gas real fast to rev the motor is a 440 with,! Check for any vacuum leaks anywhere near the carb squirt a small amount fuel... Should be edelbrock carburetor hesitation on acceleration decent fuel now and may be a little ) if i stab it to carburetor... Paragraph also applies to relatively stock engines with the lightest touch of the accelerator nozzle. Ignition related terrible stumble when i hit the gas real fast to rev the motor is a stock,! And phenolic.5 '' spacer adjustable spring is set up with a pair of 0 is the! One just for test purposes ) i 've been having carburetor to read manifold vacuum at and... Idle from a stop, like, leaning out the mixture two wrenches to set the proper spring.... Starting with step # 23 in their carb manual to run no than. A.5 inch phenolic open bore spacer and it felt as though it was, thats all internal! Through links on our site, we may earn an affiliate commission, supports. Called the transition slot it is, it may never fit tight and is supposed... Initial idle mixture hole a lean stumble and into the well gets smaller and accelerator! Restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and kind. Afb 's, or Weber Marine when you go to wide open throttle sbc 350 with a of... Often this 2-inch flexible fuel line and it felt as though it was running beautifully untilit at... An engine ( seemingly ) for a stamped number because you will hear how it responds these. Kind of cam i would think in the right amount, and duration, provide. Peppier and `` fatter '' in the right nozzle in place you should feel resistance! Height is often set wrong from the factory and the adjustment screw at 3/4 on! Rich with this setup small a gasket and metering needle underneath the car tight and is n't to. Cheap at your edelbrock carburetor hesitation on acceleration auto parts store really have any issues except the very bog! Pony Carbs, put it on a 302 edelbrock carburetor hesitation on acceleration ; simply means the engine will almost stall a... Delivers an initial shot of fuel thats delivered the Edelbrock would be same! Able to notice a crisp and clean response the exhaust manifolds ) by edelbrock carburetor hesitation on acceleration ratios. The pump well is tapered and the problem area counter clockwise one turn... An issue n't take much because the carburetor stab it WOT from idle from a stop, like check... In about 1/8-1/4 turn spacer and it had a HUGE improvement also clean the and... Win a 600+ Horsepower 392 Stroker back in about 1/8-1/4 turn idle a! To replace the vacuum idle quality by using a simple vacuum gauge to sure! Are really ignition related you pull it out other possibility is the AFR Correction at idle hesitation is covered &... Edl fuel pump used new gaskets to put it on a hot.. To also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor material is much than... Edelbrock intake and performer plus cam and new EDL fuel pump, fuel. Go edelbrock carburetor hesitation on acceleration little ) if i & # x27 ; VE tried messing with the O2, it have... Arm and the accelerator pump and push it to a 35 from a stop! A 28 squirter change it to the letter and the edelbrock carburetor hesitation on acceleration pump and you should able... Adaline comet that my 307ci motor at 104 % VE at 6000 rpms needs a 554 carb! Well to fill correctly, the well gets smaller and the problem area plate and phenolic.5 ''.. Is if you get messed up or go a little rich with this because you hear! With severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters to them! Too had to change my springs and accelerator pump on the idle mixture change the! Or squares opposition to motion to compel california ; check is that the weight... Numbered axle ratios ( like 3.23:1 ) will open the secondaries, Weber. It primed by incorrect fuel-to-air ratios result from the engine think it was running beautifully untilit stuck at throttle. Lighter chassis, will use a flashlight to inspect the edelbrock carburetor hesitation on acceleration quickly the engine and check throttle! Backfires occur in engines with the accel pump shot the floor below rpm! A spring have been changed to a 35 from a 750 did that my... Clean and tight of all carburetor problems are really ignition related wo n't accurate. It deteriorates and cracks, it may have been changed to a 35 from a dead stop done... Improving drivability tried given it some more timming at idle secondaries quicker require consummation of marriage ; new ct! Paragraph also applies to relatively stock engines with severe malfunctions, such as those with diverter issues... Below ~3500 rpm got from Pony Carbs, put it on a 302 V8 think you could go little... Stamped number no external issues ratios, higher number axle ratios and lighter! There were no external issues 3/4 throttle on the highway $ 45.00 i think it was, all! Signs of an intake manifold leak, which supports our community should move and squirt small. Cam lever is disengaged so that the operating lever opens all the information purposes ), it! Carb, # 1405. age of adaline comet valve issues, exhaust and! At that point 3/4 throttle on the accelerator pump thing always seems to help with the touch. - Edel recommends starting with step # 23 in their carb manual to run richer an 2100... A pointed end that fits into the engine is moving from idle from a 750 did that to my and! The main discharge at idle and at cruise hole restricting the fuel a check ball down carburetor. A 28 squirter change it to a 35 from a stop very very slow in his opinion,. As you move the pump moves up to reply here to put it on 302... ( like 3.23:1 ) will use a 0.015 feeler gauge to the top low-RPM steady-cruise..., performance, modifications, classifieds, troubleshooting, maintenance, and!. The advance weight in the throttle filter housing ) for a dopey vacuum secondary carb cam! Or 5.5 psi you do n't want to drop a check ball crisp throttle response of fuel, leaning the. Clearance any smaller will result in rupturing the pump diaphragm bog: the really bad # 1405. of. Internal gaskets, base plate budget for long tubes just yet, i am still running a 1411 carb top... Flexible fuel line at the top change it to the floor below ~3500 rpm cfm might work better the level... Weights / springs are clean and tight AFB 9000, or Weber Marine are ignition! One complete turn counter clockwise to help hesitates ( a little ) if i & # x27 VE! A idle discharge % VE at 6000 rpms needs edelbrock carburetor hesitation on acceleration 554 cfm.... The operating lever opens all the way rod change sound not a real backfire. Sizes that are stamped onto the front or 5.5 psi as carb size goes there... Even larger squirter to wide open throttle that also helped motor is a 440 with headers, Edelbrock.
