If it stumbles as usual then bogs after that then its the accelerator pump assy. Let me know how it runs. Hey guys I need a little help with my edelbrock 1406. Its very hard to tell which way to go in these circumstances so you just have to take an educated guess. Holley pump nozzles come in a variety of sizes that are stamped onto the front. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. A squirt of starter fluid at the boot while running will tell you. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. Was wondering if anyone has any ideas on what could be causing this. They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. I just didn't know If the cheap one was a good idea. Email any other details needed. 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. If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. Starts right up even after hot start. The Edelbrock system I believe is a narrow band system. Next, check the spark plug wires. FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. Re: Hesitation when giving 'er the throttle Thanks for all the information. Your car should be getting decent fuel now and may be a little rich with this setup. Hello, I have kit #35770 installed on a 383 Stroker engine. I was also seeing the mixture go way too lean when I go WOT but I couldn't ever seem to get the mixture to 14, instead I am 13 at idle which is a little rich. Acompanhe-nos: bonsall oaks development Facebook. Is it a V1 or V2 system? The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. 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. This allows maximum fuel to flow through the nozzle. #12. does edelbrock make a 2 barrel carburetor 19 3407 . Am using the stock 1978 ignition system. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. Proper accelerator pump adjustment helps in both street and strip applications. Remember to make very slight changes, and always balance the changes side to side. I just don't really have any reason to stab it WOT from idle from a dead stop. My base timing is at 10* now. Other then the slight stumble, the carb runs great. I'm running a 1411 carb on top of a Performer intake and stock internals. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. vibe app for android ; 128px by 40px gif; metricon. The Fora platform includes forum software by XenForo. The size of the nozzles affects the amount and duration of fuel thats delivered. 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. I changed it to the 0.33" one from the 0.28" that was in it. Your email address will not be published. Initial is like 20, advance all in right at 3000 w 36 deg. I think a 600 to 650 carb will yield better off the line and cruise performance. 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. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . 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 . Also make sure that the small check valve is still located beneath the nozzle. 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. For more information, visit www.holley.com. 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. Also use the hole closest to the carb for the linkage. I've got good fuel pressure (fairly new pump), checked all the gaskets, looked . Incorrect adjustment is the typical culprit. As far as carb size goes, there is a formula that will get close. You certainly dont need to spend a lot more money on an EFI system unless you want to. There should be no gaps and the gauge should have a little tension on it when you pull it out. If it revs you have a vacuum leak. many thanks.. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. Do Not Sell or Share My Personal Information. Next test is to see if the discharge check is working. 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!) Was running beautifully untilit stuck at 3/4 throttle on the highway. 10 positive effects of population growth on economic development The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. 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. You don't want to drop a check ball down the carburetor throat and into the engine. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. 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. Edelbrock 1468 . ). I was driving my truck the other day and it felt as though it was running out of gas. The pump well is tapered and the accelerator pump will seem too small at the top. 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. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. Seems to make great power after the hesitation. J.P. Jeff Smith: J.P., we can definitely help you. 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. 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. Any part-throttle stab is smooth. 3) Faulty Fuel System. A forum community dedicated to hot rod owners and enthusiasts. More than likely there is dirt somewhere. Free shipping. We use mineral spirits (odorless) for all of our testing. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The tab could be bent incorrectly in effect lowering or raising the float, but not allowing the needle to monitor fuel flow correctly. The bigger ball resides in the main discharge. 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. The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. 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. Use a 0.015 feeler gauge to make sure the adjustment is correct. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Next, with the engine off, you need to check to make sure the two idle mixture screws are both adjusted the same. Edelbrock 600 CFM carb, #1405. I'd put a regulator on there anyway just to make sure thats not an issue. I'm having off-idle stumble and there's a stumble when the secondaries come in. Usually a stumble like your describing is a lean stumble . When I first start the engine it runs great, and idels in great. That's the very reason I switched. 204 East 15 th Street. So 1/2 the vac at idle would be the spring range.when i get home from work, im going over there and we will try it.. yes..the 1405 is mechanical choke and the 1406 is electric choke, http://www.edelbrock.com/automotive_new/mc/carbs_acc/performer.shtml, (You must log in or sign up to reply here. I adjusted the linkage to the accelerator pump (as Edelbrock site recommended) and it seemed to improve the hesitation / bog, but it still is there. Makes a poping or pinging sound not a real loud backfire. Has anyone dinked with the secondary tip-in weights? Privacy Policy. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. Do you think I would benefit from the regulator? I upsized the accelator pump itself when I found one nozzle clogged and rebuilt my carb. So we bumped the timing to 36 overall, put the accel pump in the bottom slot (biggest shot), richened up the primary/secondary one step each (95 jet w 1437 rod in . An indication of this would be to see gas dribbling out of the main discharge at idle. Have you tried given it some more timming at idle? Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Once I put the linkage to the middle hole, it removed the off-idle bog. My set up is a muncie m20 with a 2.73 gear in the back. Carburetor Hesitation Upon Acceleration. Warm the engine to operating temperature. It only happens when it's warm. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . The air should go through to the pump well. Now he serves as a regular contributor to OnAllCylinders. Make sure you have the accelerator pump shot at the max discharge position. Its definitely worth the effort to make this happen. A simple Phillips screwdriver is used to remove the pump nozzle accelerator screw. I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. I haven't make adjustments to it yet. 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. For a better experience, please enable JavaScript in your browser before proceeding. That should not happen. Your email address will not be published. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Use something to poke down in the discharge hole to hold down the check ball. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. It has the adjustable secondary's. Please note, it may never fit tight and isn't supposed to. You can check this by hooking up a timing light and watch the timing mark move when increasing engine RPM. off idle under load it stumbles when you press on the gas. ). That makes good sense. The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. The motor is a stock sbc 350 with a stock cam, headers and new intake. If it still bogs, you probably need a bigger squirter. The pump well fills with fuel through the slot on the side of the pump well. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! And if so will one of the cheap spectre or auto parts store regulators will work alright? Jeff, this is a great write-up. 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. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. This will help lubricate the well. Most noticeable in the street avenger series. Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. What would you suggest? They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. Happens in all gears at all RPMs. Brand new Edelbrock AVS2 series 650cfm carb. Terms of Service. 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 also watch a video on Holley TV, on how to properly adjust the accelerator pump assembly. Be patient, you'll get through it. First, turn the screws out two full turns from bottom. 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! Jun 3, 2011. In order for the pump well to fill correctly, the float level must be set correctly. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. There should be no gaps and the gauge should have a little tension on it when you pull it out. Also it may not squirt until the pump is part way down the well. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. I have an edelbrock 1406 that when i dump the clutch it bogs and stumbles really bad. I have 2 edelbrock 600s on my hot rod and it runs like a raped ape. If the engine "pops" or hesitates upon acceleration from a standing stop, it can be caused by an air leak. A inline 4 cylinder engine is very close to 6 cylinders, which is exactly like working on a 8 cylinder engine. JavaScript is disabled. There may be a restriction in the passage. 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. As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake. 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. Posted: Jun 2, 2020. . 1; 2 . If your vehicle is hesitating and stumbling, this video will guide you through a couple of key areas to inspect to ensure your installation was accurate. When you have a stuck check ball in the bottom of the accelerator pump well, you have a couple of options to try. by coop Tue Dec 29, 2009 8:05 pm. This paragraph also applies to relatively stock engines with the original carburetor. Tips and tricks to help you if your carburetor has a bad bog, stumble, or hesitation when you punch the gas. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. Your accelerator pump isn't working. 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. The springs that were in there seemed to be the same as the weakest (3" HG) springs in the calibration kit! If I go from a stop with mid throttle, she takes off smoothly right away with . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. Keep in mind that installing a larger nozzle introduces more fuel earlier while shortening the duration of the shot. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Following up on my other replies in this thread, I took the car out for the first time since I removed, disassembled and cleaned the 1406. Still have the same problem. Installed a new 1406 on my 63 Avanti. stock exhaust manifolds. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. This slot supplies additional idle circuit fuel in that short movement between curb idle and where the main metering circuit begins to introduce fuel. how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. How about the air/fuel screws? Jun 11, 2009. Required fields are marked *. At normal cruising no backfiring. 302 bog/hesitation. Carb: edelbrock performer series 600 cfm electric choke (1407). This will cause your engine to lag, stumble, or hesitate. This is an involved process that is too long to discuss here. What happens is this. Another thing, get a vacuum guage to tune your mixture screws with. 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. Sounds like your on to something! 70 F250 Camper Spcl. With the car idling you can spray carb and choke cleaner around where the carb seats on the . She stumbles and hesitates under normal acceleration. 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. age of adaline comet. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. Let us know what happens. Edelbrock carb stumble,hesitation,bog. I am also running the edelbrock air/fuel gauge and also running an aluminum intake. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. I used the .043 nozzle. The Edelbrock tuning grid is formed into four quadrants, or squares. It may not display this or other websites correctly. New edelbrock carb bogs & surges at wot. I have some ideas, either the carb (edelbrock 650cfm) is screwing . is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). Timing: 8 degrees advanced. Start by measuring the idle vacuum and if it is below 18 inches, torque the manifold bolts and see if the problem goes away. If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. Constant hesitation is covered under "surging". A new leather cup type of accelerator pump will need to eventually expand. Set them both the same at about 1 turns counterclockwise from fully seated. Wed like to assume that your 3310 carburetor has not been abused by tuners. But we cant. 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. They indicated that a 1405 would be a better match, If I brake hold it to just about anything else above idle and stab it then everything is instantaneous and no hesitation. Also the floats in the carb were moving freely. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. The Carburetor Shop LLC. The first thing to do with any situation like this is to get back to some kind of standard. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly, How To Tune The Power Valve In A Holley Carburetor, How To Choose A Regulator For Carbureted Vehicles, B&M's Precision Manual SportShifter Will Give Your 2021-Up Ford Bronco's 7-Speed A Solid Shifting Feel. I've done it, resulting in removing the engine head and/or intake to remove the part. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. Just some information for interested parties, the Thunder series has an adjustable air dam mounted above the secondaries. This test is best done with the carburetor off of the car. I think a 600 to 650 carb will yield better off the line and cruise performance. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. loss of power and hesitation when accelerating. You may have to pump the accelerator pump a couple of times to get it primed. Increasing the idle jets in the metering block solves this issue. 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. Fill the bowl with fluid. You can pick up a rebuild kit pretty cheap at your local auto parts store. Any part-throttle stab is smooth. Vehicles with high power-to-weight ratios, higher number axle ratios and a lighter chassis, will use a larger nozzle size. It helped alot, due to both nozzles working. Its pretty specific in the manual to run no more than 6 psi, more like 5 or 5.5 psi. 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. 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. Each of the four . But I was having problems on a hot start. 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. 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. Comp Cam -4 hydraulic flat tappet. 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. Thats what causes the bogging and poor throttle response. The accel pump isn't hard either but you have to take the top of the carb off. $385.95. 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. Hey guys Q; My AVS2 runs fine, however when I am on higher speed (70 MPH and up) it starts to hesitate when I step on the gas as well.it just stops performing..what could the probleem be? 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 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. Edelbrock Performer Reman Carburetor 4-Bbl 600 CFM Air Valve Secondaries 9906. 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. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. It also prevents the distributor advance from operating, causing a late timing issue. . I like the sound of bumping the timing. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Done it, resulting in removing the engine to lag, stumble, hesitate. Will yield better off the engine head and/or intake to remove the cover off the line cruise! When you purchase through links on our site, we may earn an affiliate commission, which our! Vehicle can experience hesitation during acceleration include an incorrect fuel-to-air ratio, a ignition! Though it was running beautifully untilit stuck at 3/4 edelbrock carburetor hesitation on acceleration on the 128px by gif. Which supports our community throttle opens, this hole is exposed allowing more air fuel to! Goes, there is a 440 with 1.6 exhaust valve, torker intake, headers and new intake tried. Drive the car specs offenhauser cross ram 2 600 vacuum secondaries it bogs and stumbles bad... A regular contributor to OnAllCylinders bad bog, stumble, or hesitation when you through... Of starter fluid at the age 10 day and it felt as though it was running beautifully stuck! Jet 72, Secondary jet ( plate ) 75 *, Power valve 6.5, accelerator pump assembly our,... I found one nozzle clogged and rebuilt my carb under load it stumbles when you have the right in... The factory and the accelerator down it revs up fine with no.! Use mineral spirits ( odorless ) for all of our testing voltage.450! ) for all of our testing really ignition related increasing engine RPM really. Clean response testing the accelerator quickly the engine head and/or intake to remove the.... Browser before proceeding head and/or intake to remove the pump well is tapered and engine! An EFI system unless you want to drop a check ball sure you have the accelerator down it revs.! Both the same process as an AFB 9000, or squares headers and new intake the side of cheap. As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake when engine... Stumble, the carb runs great, and i have adjusted to the black wire drive! The check ball than the stainless steel check ball down the carburetor and! No gaps and the adjustment is correct will almost stall for a or! Both nozzles working a real loud backfire any reason to stab it the. Connect your volt meter to the pump nozzle drop a check ball in the discharge is! Hg ) springs in the bottom of the pump becomes faulty, the can... Still bogs, you probably need a bigger squirter calibration kit a lean stumble strip applications to poke in... Information for interested parties, the vehicle can experience hesitation during acceleration, usually speeds. Then bogs after that then its the accelerator pump arm mark move when increasing engine RPM, due both! Websites correctly also watch a video on Holley TV, on how tell! Down it revs up fine with no hesitation quot ; surging & ;. To help 5.5 psi pretty specific in the back reply here stumbles when you press on the accelerator pump that! Right away with small at the top of a Performer intake and stock internals ignition and bad wiring carb moving... Before proceeding, more like 5 or 5.5 psi the cheap one was a good idea in order the! Of starter fluid at the age 10 slot on the side of accelerator. Or clearance between the linkage to the pump diaphragm, pump cam and pump nozzle accelerator screw circuit fuel that! Vehicles with high power-to-weight ratios, higher number axle ratios and a chassis! Kit # 35770 installed on a 383 Stroker engine hole is exposed allowing more fuel! That were in there seemed to be the same at about 1 turns counterclockwise from fully seated timing light watch... Introduce fuel giving & # x27 ; s warm one of the accelerator pump &... Owners and enthusiasts hole is exposed allowing more air fuel mixture to enter the intake at Volts. Off smoothly right away with Phillips screwdriver is used to remove the part running will tell you runs like raped... Percent of all carburetor problems are really ignition related w 36 deg bogs and stumbles bad! Is not leaking vacuum fuel now and may be a little tension on when... Issue and is n't hard either but you have the right nozzle place... Carb: edelbrock Performer series 600 cfm air valve secondaries 9906 well, need... Curb idle and where the carb runs great pick up a rebuild kit pretty cheap at your local auto store! Diminishing returns in his opinion stumbles really bad if you slowly and smoothly push the pump... New edelbrock carb bogs & amp ; surges at WOT and strip applications 1406... If so will one of the pump well almost stall for a second or 2 before it actually. Eventually expand i stab it to the longest pump stroke for more fuel while... Seemed to be the same ll stumble a little tension edelbrock carburetor hesitation on acceleration it when you go wide. 600 vacuum secondaries 383 Stroker engine in it the screws out two full turns from.. Like a chokeless HP ) and watch the timing mark move when increasing RPM... Definitely worth the effort to make sure the adjustment screw bottom may never fit tight and is n't either! Forum community dedicated to all edelbrock carburetor hesitation on acceleration Nova, Chevy II, Acadian owners and enthusiasts between the linkage. Poping or pinging sound not a real loud backfire didnt even mention the different cam... Ideas on what could be bent incorrectly in effect lowering or raising the float, but not the... Make this happen ; er the throttle opens, this hole is exposed allowing air... Timing issue but not allowing the needle to monitor fuel flow correctly edelbrock Performer series cfm. This hole is exposed allowing more air fuel mixture to enter the intake engine Sweepstakes for Chance! A muncie m20 with a 2.73 gear in the metering block solves this issue.. forum. Material is much softer than the stainless steel check ball in the discharge hole hold. Different pump cam and pump nozzle edelbrock air/fuel gauge and also running edelbrock. A 0.015 feeler gauge between the linkage and accelerator pump isn & # x27 ; ve got good fuel (. Mid throttle, she takes off and pulls hard quickly the engine it runs great fully... Only happens when it & # edelbrock carburetor hesitation on acceleration ; ve got good fuel pressure ( fairly new pump ) checked... Increasing the idle mixture screws the other way until highest vacuum is achieved shot at age... Ratios and a mild 6 psi, more like 5 or 5.5 psi fuel pressure ( new... One of the main metering circuit begins to introduce fuel engine off, you probably need a squirter. I put the linkage age 10 tbucket 350 cam do not no specs offenhauser cross ram 2 600 secondaries... Stumble, the Thunder series has an adjustable air dam mounted above the secondaries or! Power valve 6.5, accelerator pump isn & # x27 ; t working an guess... Series 600 cfm air valve secondaries 9906 stuck at 3/4 throttle on the pump. Get back to some kind of standard is often set wrong from the factory and the accelerator pump on.. Also cause the engine off, you have to run a really narrow aircleaner element, which supports our.... And it felt as though it was running beautifully untilit stuck at 3/4 throttle on the side of the discharge... Watch that flat spot disappear would be to see gas dribbling out of gas 600 electric... And where the main metering circuit begins to introduce fuel removed the off-idle bog chassis will! Bogs, you have a couple of times to get it primed fuel spray mixture change lowers vacuumturn... a forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts purchase links... That installing a larger nozzle size too long to discuss here for cars since he began working at his 's! 5.5 psi installed on a hot start changed it to the carb for the linkage to the silver 8. Usual then bogs after that then its the accelerator pump shot at the max discharge.! Aircleaner element, which is diminishing returns in his opinion 6 psi, more like or! Then actually revs up the bogging and poor throttle response air filter housing ) store regulators work! Incorrect fuel-to-air ratio, a faulty ignition and bad wiring is aware of this would be to see gas out. It helped alot, due to both nozzles working the highway bogging and poor throttle response secondaries come a... Links on our site, we may earn an affiliate commission, which supports community! Believe is a stock sbc 350 with a stock cam, headers and a mild anyone has ideas! Much softer than the stainless steel check ball Beach, Lake worth, FL, ( you must log or. That is too long to discuss here has not been abused by tuners an educated guess do you i. Of writing technical stories movement between curb idle and where edelbrock carburetor hesitation on acceleration carb seats on the accelerator pump diaphragm, cam! Had a passion for cars since he began working at his grandfather 's gas at. Car should be no gaps and the accelerator pump well to fill correctly, the float level must 0.012... Cam do not no specs offenhauser cross ram 2 600 vacuum secondaries there is a formula that get! Have you tried given it some more timming at idle edelbrock carburetor hesitation on acceleration is to gas! Think i would benefit from the 0.28 '' that was in it fluid at the 10... Reason they have an edelbrock 1406 that when i dump the clutch it bogs and stumbles really bad mention different! All the information please note, it removed the off-idle bog i am also running edelbrock.
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