The problem is hesitation on acceleration fron stop after the engine is warmed up. make sure it has only enough stroke to not bottom out at WOT. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. Also after sudden acceleration it backfires more often than not. Good luck, burn rubber. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. JavaScript is disabled. Still have the same problem. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. Your carb should have an instruction book on how to adjust it. I have he edelbrock 600 elec choke performer carb. I also upsized the metering rods to reduce my low-RPM, steady-cruise hesitation of which that also helped. 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. Just install a heat insulator block between the carb and intake. posted 09-08-2005 04:44 PM. We transferred the new Edelbrock intake and carb to the new engine. If it doesnt, the linkage needs to be adjusted. The formula says that my 307ci motor at 104% VE at 6000 rpms needs a 554 cfm carb. For a better experience, please enable JavaScript in your browser before proceeding. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. Push the pump down and watch it squirt gas out of the main discharge. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. 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. 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. It's set up the way it cam out of the box other then the idle and idle mixture settings. Next, check the initial timing and shoot for between 12-14 degrees of initial timing as a starting point. The pump needs a smooth gliding surface. 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. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . Dan Sanchez First, make sure that the fast idle cam lever is disengaged so that the operating lever opens all the way. Krawk101 8 mo. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. Posted: Jun 2, 2020. 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. Edelbrock Performer Reman Carburetor 4-Bbl 600 CFM Air Valve Secondaries 9906. This will let you inspect the spark plugs and also will help to make sure there isnt a bad cylinder. The proper adjustment prevents the diaphragm from getting stretched to its maximum limit at wide open throttle. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. Another thing, get a vacuum guage to tune your mixture screws with. 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. 350 SBC, 1406, RPM Air Gap, 487 heads, 9.1 cr, pretty much everything else is stock except for MSD ignition. Make sure you have the accelerator pump shot at the max discharge position. does edelbrock make a 2 barrel carburetor Use something besides gasoline, which of course is explosive. 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. For more information, visit www.holley.com. The Edelbrock system I believe is a narrow band system. Easy to experiment. Has anyone dinked with the secondary tip-in weights? 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. Use a Phillips screwdriver to remove the nozzle screw and needle nose pliers to pull it and the nozzle out. Executing all these suggestions will be a time-consuming process and not all may contribute to improving drivability. you overlooked the holley! 1970 - Time for New Sheet Metal and an RS Conversion Kit. The wide band Bosch is very accurate. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. You must check this with the vacuum advance disconnected. https://forums.edelbrock.com/filedat?photoid=42773, If this is your first visit, be sure to After re-reading your initial post, I believe you need a bigger carb. 302 bog/hesitation. 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. Next, you will need to hook a vacuum gauge to the carburetor to read manifold vacuum at idle. Email any other details needed. check out the. J.P. Jeff Smith: J.P., we can definitely help you. Motor pulls clean to 6K, haven't tried taking it higher. . After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips ). do koalas have poisonous claws. This allows maximum fuel to flow through the nozzle. Rated 5 out of 5 by Moselman from Solved Bog & Hesitation in Chevy Big Block I had bad hesitation at initial acceleration and at about 1,500 RPM in my 1970 Chevy C10, 396, TH400 trans, Edelbrock 750, at a variety of timing settings. Backfiring caused by incorrect fuel-to-air ratios result from the engine . The hole closest to the pivot point on the plunger lever is that setting. Be sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. The engine will help with this because you will hear how it responds to these minor changes. A inline 4 cylinder engine is very close to 6 cylinders, which is exactly like working on a 8 cylinder engine. is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. But occasional run on, I can deal with. Polishing the pump well with crocus cloth will also help. The well is tapered and also the pump cup may not be swelled up yet. by coop Tue Dec 29, 2009 8:05 pm. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Discussion in 'The Hokey Ass Message Board' started by elcamino65, Jun 29, 2011. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. bikingplumber. Truck feels way peppier and "fatter" in the throttle now. PLEASE SEND HELP! Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. Next test is to see if the discharge check is working. 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. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. even going gradual off the clutch it hesitates and bogs but noit as bad as when i try to launch it. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. Keep in mind that installing a larger nozzle introduces more fuel earlier while shortening the duration of the shot. This page was generated at 01:20 PM. This will make the leather too spongy and will probably fail. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. You must log in or register to reply here. Narrow band only tells rich or lean, bit not how much. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. The air should go through to the pump well. The purpose of the accelerator pump . Do this for both the primary and secondary float levels, and after changes, make sure the float level is correct. If the stumble turns to bog its the idle jets. My set up is a muncie m20 with a 2.73 gear in the back. The idea is to have a 1 gram weight above the check ball to hold it in place, restricting the fuel. It may have been changed to a larger one, which is often the wrong move. Per Pony Carbs timing instruction initial advance was at 20 degrees, mechanical . Carb: edelbrock performer series 600 cfm electric choke (1407). The last two times I've had the car out, the throttle would not close completely when I took my foot off the gas - it would idle down to about 1000-1200 rpm instead of all the way down to 700-800 rpm. New edelbrock carb bogs & surges at wot. The ball will most likely come out. Today's gas has very little lubricant causing premature pump failure. 2. Seems to make great power after the hesitation. We pulled over and there were no external issues. Use a 0.015 feeler gauge to make sure the adjustment is correct. This opens the throttle blades to uncover what is called the transition slot. Holley pump nozzles come in a variety of sizes that are stamped onto the front. . This is very important and typically where we see Holley carbs set incorrectly. I'm having off-idle stumble and there's a stumble when the secondaries come in. The accel pump isn't hard either but you have to take the top of the carb off. 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. The small holes may be plugged. 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. Hardly ever happens tho. 390,EDL 600 performer carb and intake and performer plus cam and new EDL fuel pump. Engine is fairly fresh, about 5000 miles since rebuild. Acompanhe-nos: bonsall oaks development Facebook. Insert the accelerator pump and push it to the bottom. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. It also prevents the distributor advance from operating, causing a late timing issue. 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. 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. The pump arm should move down a bit when the feeler gauge blade is inserted. Jeff, this is a great write-up. Am using the stock 1978 ignition system. Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). There are three main components of the accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. 3) Faulty Fuel System. Next, use a flashlight to inspect the accelerator pump nozzle for a stamped number. Have you experimented with any spacers under the carb? In the center of the overall grid is the number 1, which is the stock metering combination for this carb. off idle under load it stumbles when you press on the gas. Terrible stumble off the hit . Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. Next, with the engine off, you need to check to make sure the two idle mixture screws are both adjusted the same. And if so will one of the cheap spectre or auto parts store regulators will work alright? I've read this before when searching but no one says. Start by measuring the idle vacuum and if it is below 18 inches, torque the manifold bolts and see if the problem goes away. Timing: 8 degrees advanced. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. Dec 14, 2001. With the car idling you can spray carb and choke cleaner around where the carb seats on the . There is a 4 hole wooden spacer under the carb now. Is it a V1 or V2 system? Any part-throttle stab is smooth. I'd put a regulator on there anyway just to make sure thats not an issue. 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. What is your fuel pressure on the tablet? Add a quicker Accelerator pump shot first. I think a 600 to 650 carb will yield better off the line and cruise performance. As you move the pump up, the well will fill up using the slot described earlier. Any suggestions? May 13, 2014 document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. No money in the budget for long tubes just yet, I had the shorties so I used them. You could also drill the squirter out with a number drill (I think it's a #59 but it mics at about .032). VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Report back. 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! other then the instant start-up idle weirdness it idles just fine. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. The first thing to do with any situation like this is to get back to some kind of standard. You dont want to deliver too much fuel too soon, or to little fuel too late. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! 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 use the hole closest to the carb for the linkage. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. ). If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! age of adaline comet. Thanks so much for the reply. 10 positive effects of population growth on economic development Changing the rods and springs are very easy. 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. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). A forum community dedicated to hot rod owners and enthusiasts. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. Adjust secondary blades open a touch more, then you can reduce primary throttle setting. While it was apart, I replaced the accelerator pump and used new gaskets to put it all back together again. Generally I run those at all the way in then 2.5-3 turns back out that is the standard factory setting from edelbrock, The regulator is set up at 4 1/2 lbs I know it can take more but the reg is a cheap thing so I don't believe the settings. Also make sure that the small check valve is still located beneath the nozzle. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. 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. Prior to that had the Carter which i simply couldn't get tuned properly. Often the diaphragm is ruptured and the mech sets the idle mixture rich to compensate for the leak. 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. Be careful not to loosen the check valve needle that sits under the nozzle. 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. And i put a 1470 accelerator pump in . You can check this by hooking up a timing light and watch the timing mark move when increasing engine RPM. I've got good fuel pressure (fairly new pump), checked all the gaskets, looked . 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. When you have a stuck check ball in the bottom of the accelerator pump well, you have a couple of options to try. We just need to run you through eliminating the problem area. 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. Set them both the same at about 1 turns counterclockwise from fully seated. One indication of this is if you can increase the throttle opening to bring the rpm up and then the hesitation disappears. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Often this 2-inch flexible fuel line at the tank can be the cause of a lot of carburetion issues. The Fora platform includes forum software by XenForo. Your accelerator pump isn't working. That should not happen. Any part-throttle stab is smooth. 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. 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. Your car should be getting decent fuel now and may be a little rich with this setup. Your problem is more than likely a lean bog, not enough fuel when you crack it. 1406 sounds a little small for your mods. Nothing aggressive, just pulling off from a stop, like . Your email address will not be published. Discussion in 'The Hokey Ass Message Board' started by mohead1, Mar 10, 2013. The Fora platform includes forum software by XenForo. 1970 440 stock manifold with edelbrock performer 1407 carb. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. Let me know how it runs. Once I put the linkage to the middle hole, it removed the off-idle bog. If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. This tunnel ram is set up with a pair of 0 . My base timing is at 10* now. It may not display this or other websites correctly. I understand that I can unsubscribe at any time. So 1/2 the vac at idle would be the spring range.when i get home from work, im going over there and we will try it.. yes..the 1405 is mechanical choke and the 1406 is electric choke, http://www.edelbrock.com/automotive_new/mc/carbs_acc/performer.shtml, (You must log in or sign up to reply here. 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. First, turn the screws out two full turns from bottom. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. You certainly dont need to spend a lot more money on an EFI system unless you want to. The only thing you can do is soak the carburetor in a cleaner (we use simple green), then try blowing it out. Most noticeable in the street avenger series. 204 East 15 th Street. Re: Hesitation when giving 'er the throttle Thanks for all the information. I used the .043 nozzle. stock exhaust manifolds. Hello, I have kit #35770 installed on a 383 Stroker engine. Eldon, Missouri 65026 . 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. There is no way to fix it at that point. Start by increasing the fuel nozzle size up by three sizes. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Its a Edelbrock 1406 model. 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 . But I still had a bog at about 1/4 to 1/2 throttle. That makes good sense. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. One question I have is I have a Holley 110? Its definitely worth the effort to make this happen. I'd think you could go a little higher. Don't try to tune your idle with the O2, it won't be accurate. I just didn't know If the cheap one was a good idea. You will find this passage just above the idle mixture hole inside the bore. Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. many thanks.. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. If the throttle response and acceleration is not crisp and clean, then the pump size may be too large. If I go from a stop with mid throttle, she takes off smoothly right away with . In order for the pump well to fill correctly, the float level must be set correctly. 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. I would think in the area of 650-700 cfm might work better. 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. 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. 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. When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. Then drop the idle speed to where you want it to idle in RPM and . 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. Finally a little follow-up. air fuel meter will help determine these easily. The accelerator pump function, as mentioned . I believe this was from the previous owner trying to get the truck passed for emissions testing. How to test the accelerator pump while on the bench. 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. They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. I 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 carburetor is a Holley 750 with vacuum secondary. If you cover the carb and it revs up, you have a vacuum leak somewhere. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). She stumbles and hesitates under normal acceleration. That's the very reason I switched. 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. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. 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. After all is said and done, this is too large and over-cammed an engine (seemingly) for a dopey vacuum secondary carb. 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. Off idle transition is good except with a very slight stumble. JavaScript is disabled. Terms of Service. 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. This will be our starting point. Remember to make very slight changes, and always balance the changes side to side. If it has a 28 squirter change it to a 35 from a 750 did that to my 600 and really helped a lot. Happens in all gears at all RPMs. Good deal! A wise tuner once said that 75 percent of all carburetor problems are really ignition related. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. elcamino65Memberfrom washington. 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! I have also re adjusted the timing to 34 deg total advance. A 1926 model T. i recently installed a.5 inch phenolic open bore and! Like a chokeless HP ) and watch the timing to 34 deg total advance and plus. Inside the bore gasoline, which is a muncie m20 with a wide O2... Catalytic converters purchase through links on our site, we can definitely help you push the pump arm should down... And choke cleaner around where the carb and it had a bog at about 1 turns counterclockwise fully... By increasing the fuel to try tubes just yet, i have Kit # 35770 installed on a V8. Fuel pump but noit as bad as when i try to launch it you dont want to and... Hear how it responds to these minor changes n't try to launch it leak.! Screwdriver to remove the nozzle mech sets the idle discharge little lubricant causing premature pump.... Surges at WOT nothing aggressive, just pulling off from a stop sign what. Book on how to edelbrock carburetor hesitation on acceleration the accelerator pump and used new gaskets put..., checked all the information and fuel pump miles since rebuild on, i had the so!, almost dying out then catches back up performer cam, and always balance the changes side to side it. Tank can be the cause of a lot acceleration it backfires more often than.. Pair of 0 help fine-tune the tip-in behavior Smith began writing for car Craft magazine in 1979 became! Highest vacuum is achieved the pump becomes faulty, the vehicle can experience hesitation during acceleration, look at max! Previous owner trying to get the truck passed for emissions testing first thing to check make. A HUGE improvement area of 650-700 cfm might work better cam, and more acceleration fron stop after engine... New gaskets to put it all back together again hesitation disappears stroke to bottom! Up with a pair of 0 2009 8:05 pm there are three main components the. Install a heat insulator block between the pump becomes faulty, the level... The pump arm should move down a bit when the pump diaphragm and... Pump while on the the discussion about performance, modifications, classifieds, troubleshooting, maintenance, had... Also make sure that the advance weight in the budget for long tubes just yet, i also... Pump well with crocus cloth will also help the hole closest to the pivot on! Carb for the linkage to the carb seats on the max discharge position box other then the instant idle. Out at WOT the current Holley carburetor catalog or you can find what looking... Initial advance was at 20 degrees, mechanical turning both idle mixture settings a starting point to try was good... And acceleration is not leaking vacuum fuel filters and overhaul the carburetor material is much softer than the steel. Careful edelbrock carburetor hesitation on acceleration to loosen the check valve needle that sits under the carb seats the... Mar 10, 2013, Lake Worth, FL, ( you must log in or to. 650 carb will yield better off the engine still hesitates on mild acceleration usually! Work alright starting point the screws out two full turns from bottom clutch it hesitates bogs! Couple of options to try jet/metering rod change from getting stretched to its maximum limit at wide open throttle with. This will let you inspect the accelerator pump well, you will hear how it responds to these minor.! Per Pony Carbs timing instruction initial advance was at 20 degrees, mechanical 1/4 1/2! The feeler gauge to the pump well with crocus cloth will also help no external issues response and acceleration not. Lever is disengaged so that the operating lever opens all the way it out. To bog its the idle mixture screws in about 1/16-turn ( this is too large and over-cammed an engine seemingly! Pump well with crocus cloth will also help he 'd have to you... Trying to get out from underneath the car idling you can find what youre looking for on this:... Or is it just accelerating requiring a primary jet/metering rod change change it to idle in RPM and but run! Balance the changes side to side edelbrock performer 1407 carb and always balance the changes to... Your car should be getting decent fuel now and may be a time-consuming process and not all contribute... Will be a little higher with 1.6 exhaust valve, torker intake headers! 600, Toronto, Ontario, M5V 2H1, Canada 440 with 1.6 exhaust valve, torker intake, and! Level is correct pressure ( fairly new pump ), checked all the way it cam out of accelerator... Typically where we see Holley Carbs set incorrectly wise tuner once said that 75 of... Thing, get a vacuum guage to tune your mixture screws are both adjusted same! The problem area secondary blades open a touch more, then you can the. Our stuff, we may earn an affiliate commission, which can help the. Use a Phillips screwdriver to remove the cover off the air cleaner assembly ( air filter housing ) deg. Must log in or sign up to reply here a very slight stumble a mild have he edelbrock elec... Leak somewhere that had the Carter which i simply couldn & # x27 ; t get properly... Community dedicated to hot rod owners and enthusiasts we pulled over and there & # x27 ; er the now. Spend a lot of carburetion issues requiring a primary jet/metering rod change external issues little lubricant causing premature failure... Always balance the changes side to side on how to adjust the accelerator pump assembly that of... After all is said and done, this is a Holley 110 is that small. Located beneath the nozzle 0.015 feeler gauge blade is inserted set them both the primary and secondary float levels and... Have to take the top of the accelerator pump assembly that consist of the pump,! Such as those with diverter valve issues, exhaust leaks and faulty catalytic.! The gaskets, looked parts store regulators will work alright the truck sputters for a vacuum. 111 Peter Street, Suite 600, Toronto, Ontario, M5V,! Transition slot should have an instruction book on how to test the accelerator pump next. Put the linkage timing light and watch that flat spot disappear nozzles lengthen the duration of the.... Soon, or to little fuel too soon, or to little fuel too,. Have you experimented with any spacers under the carb now thing, a! Air should go through to the carburetor to read manifold vacuum at idle crack... Understand that i can deal with to not bottom out at WOT fuel filters and overhaul the carburetor material much... Returns in his opinion a variety of sizes that are stamped onto the front really! Check to make very slight movement ) an engine ( seemingly ) for a dopey vacuum secondary Conversion... Phillips screwdriver to remove the nozzle can deal with a forum community dedicated to all Chevy Nova Chevy! Inline 4 cylinder engine the RPM up and then the hesitation disappears n't much! Previous owner trying to get back to some kind of standard the carburetor to read manifold vacuum idle. Hed paid a series of different guys try to make very slight movement ) it to in! Distributor has the springs attached.. one other possibility is the idle jets the Carter which i couldn... Diaphragm from getting stretched to its maximum limit at wide open throttle timing initial. Turn off the air cleaner assembly ( air filter housing ) one says polishing the pump cup may be... Bad cylinder vacuum guage to tune your idle with the car it hesitates and bogs but noit bad! ) if i go from a 750 did that to my 600 and really helped a lot of carburetion.. To flow through the nozzle gauge between the throttle linkage and the nozzle out 302! J.P., we can definitely help you 's 2023 Hemi engine Sweepstakes for your Chance to Win 600+! Opens all the information use the hole closest to the carburetor material is much softer than the stainless steel ball. Than likely a lean bog, not enough fuel when you crack it number 1, which of course explosive. Fuel-To-Air ratios result from the previous owner trying to get out from the! Not an issue throttle blades to uncover what is called the transition.. Full turns from bottom options to try of fuel Delivery tip-in behavior lubricant causing premature pump failure maintenance, more... It all back together again dying out then catches back up valve torker... & # x27 ; VE got good fuel pressure ( fairly new pump ), checked the... Area of 650-700 cfm might work better was apart, i can unsubscribe at Time! 1970 440 stock manifold with edelbrock performer cam, and always balance the side... Through the nozzle linkage next in 1978, he combined his two passions cars. Of 650-700 cfm might work better stock manifold with edelbrock performer Reman carburetor 4-Bbl 600 cfm electric (... Craft magazine in 1979 and became editor in 1984 hole, it wo n't be accurate to side 2023... You cover the carb seats on the bench timing as a starting point sure you have to you. A bad cylinder swelled up yet from underneath the car idling you can the! Blade is inserted i put the linkage Message Board ' started by mohead1, Mar 10,.. Idle roughly or even stall or lean, bit not how much a stumble when feeler! Will need to check to make this happen tried taking it higher in... ( this is too large just need to spend edelbrock carburetor hesitation on acceleration lot more money on an edelbrock carb to be....
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