During recent runs, engine bogs at 2500 rpm (normal WOT is about 4000), starts to choke a little. But I'm serious, next time you pull off that separator trash it. Holder, Anchor & Dock i'd bet on the fuel pump. & Circuit Like bypass it? Bullet Skimmer, Paint and Accessories, Boat Lift Canopy If the choke could be the problem since it's only when it's cold how would I check that? (You must log in or sign up to reply here. Convenient when it's time to pin the butterflies. ACCOUNT, Find The idle is set at 900rpm without vaccume advance plugged in. 1. check to make sure you are getting a good accelerator pump squirt 2. Older Quadrajet part numbers begin with 702 and 704. I cannot figure it out. Here is a scenario that may help. 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. It would not be a permanent fix by any means, but until all the parts for the choke are located I figured this could serve the same purpose. Make sure the timing is not delayed due to a slipped timing mark or too much vacuum advance (20-30 degr.). Parts, Inflatable Boarding, Paddles & your boats Gel Coat Match, Shop Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly. The Quadrajet has 1 3/32- or 1 7/32-inch primary throttle bores with either 750 or 800 cfm. 1160 hours on engine. So i couldn't hold the bottom fitting while i twisted the top to get the pick up out. The best approach to a Quadrajet rebuild is to open all passages and make sure they are clear. The Mercruiser 5.0LX in my 1989 Arriva 2050 KE has been running well for the last couple of years. The Q jet is a fantastic carb. Here is a scenario that may help. Remanufactured stock replacement and high-performance units are still readily available from a variety of sources, including JET Performance Products (JET). Covers, Boat Seat Accessories, Pontoon Bimini Webtypes of bog: the first is bog when the vehicle is accelerated from a stop; the second is bog when the vehicle is accelerated from cruise. Bilge Pump, Tires, Rims, & Hub Keeps the air valve closed when there is manifold vacuum (light throttle) applied to the unloader. Along with a good timing curve, is the choke vacuum pull-off set-up correctly or hooked up. The 800 CFM unit (identified by a slightly larger primary venturi) was relatively rare, found only on 1971-73 Buicks and 1973 Pontiacs. So after NUMEROUS itty bitty turns i pulled it out and here is the valve (from the fuel line side), Pretty well closed up with crud. Software, Digital Cushions, Lexington Big-blocks want 800 cfm. That is, until my last outing Under heavy acceleration, the engine bogged down and stumbled. Galley, Covers and They are actually about as simple as a stone axe. Check the fuel tank vent and the anti-syphon check valve. All this is assuming your ignition system is up to snuff. Any ideas? Oars, Wakeboard, Wakesurf & The Quadrajet fuel bowl is one big continuous reservoir for all four bores. & Sonar, Trolling On on end of the secondary air door shaft, on the underside, is a small clamp screw. it is a small pin on the passenger side of the carb. http://s1232.photobucket.com/albums/ff362/Nickvt/, http://s1232.photobucket.com/albums/ff362/Nickvt/1934 Plymouth/, http://www.youtube.com/watch?v=Yn420s-LDzY, http://s80.photobucket.com/albums/jvideos/?action=view¤t=2011_09110020.mp4. But, if you try to jump on it, let's say more than 1/2 throttle all at once, the car sounds like it is backfiring or popping in the carb. So whether or not that was causing my issue or not, i dont know. Engine is 1986 model mercruiser MIE 340 big block with quadrajet carb. was strange. As we've stated previously, the Quadrajet is an excellent fuel-metering device, one that was very well engineered, allowing it to provide both economy and performance along with the reliability required for daily driving. I am no expert on the Q-jet, so I'd like some thoughts on adjustment. Vacuum leaks can exist away from the engine, such as at the power brake booster, climate control, and more. Accelerates smoothly and with no problem. Breakers, Power Packs & Jump When a Quadrajet is installed in a stock application it's operating in the environment it was designed for. I've tried adjusting timing, hasn't changed anything. Trailer Winches, Shop Fuel filters are dirty, or plugged replace any in-line filter and the filter at the carburetor fuel inlet. Well, my ignition coil went out so when I replaced it I pulled the rotor off and checked the distributor weights and they are working fine. The Quadrajet's basic design didn't change much over its 25-year production life with the exception being the introduction of APT (Adjustable Part Throttle) in 1968 and electronic mixture control later. Insurance, Boat WebJET Performance offers remanufactured Rochester Quadrajet carburetors and tuning kits. Boat Repair, Boat Paint & Terms of Service. Although the E4M sounds complex it's actually quite simple. The Bog simply means the engine is not receiving enough fuel when you go to wide open throttle. The car ran, but would bog on acceleration and backfire through the carb too. I don't know if its a problem but try wiring the secondaries shut to see if that solves the problem. Vacuum leaks can pop up elsewhere, too, between carburetor body contact surfaces and vacuum ports. LOL. Zincs, Generator In fact, under normal driving conditions the Quadrajet performs quite well. However, you're not going to need that much flow for great street/strip performance. Deals, Pumps & Plumbing No idea why..about to pull it apart again and see if I can figure out what the problem is. Ford did it via the 4300/4300D/4350 carburetors. I'm not sure I understand what you are talking about with release rate of the pull off? Amazing what ends up in a reasonably clean fuel system. A damper to slow down the opening rate of the air valve to approx 1 to 3 seconds. I don't know if its a problem but The 800 CFM unit (identified by a slightly larger primary venturi) was relatively rare, found only on 1971-73 Buicks and 1973 Pontiacs. Before we go any further, the "CCC" (Computer Command Control) electronic control Quadrajet, known as the "E4M", cannot be used on a non-CCC vehicle. Hits hard every time I stomp on it since it was installed. The car ran, but would bog on acceleration and backfire through the carb too. Just set it to 675 hot neutral idle and you'll be happy. They are actually about as simple as a stone axe. Covers, Boat Shrink Wrap Platforms, Slide Now, Shop The Quadrajet four-barrel carburetor was produced by the Rochester Carburetor Division of General Motors from 1965-'90. Hangers are identified by letter stamping, offered in increments from B to V. Float level may be too low set to specifications. Accessories, Marine Electrical If that little plastic cam lifts the metering rods when you push open the butterflies then the passages the jets are in could be plugged. When the motor is warm it hesitates but barely. Tops, Other Biminis, RV & Trailer And this has been proven in drag racing for decades. Deals, Camping & RV Check yours by pushing it all the way in and count the seconds that it takes to come all the way back out. GPS Chartplotter and Fish Finder Combo, Find The first round of Quadrajet improvements came in 1968 with the APT (adjustable part throttle) feature, which enabled more finite tuning and a smoother transition from idle to power circuit. Needle sticking or not opening enough? Ski, Wakeboard Covers, Boat Wiring & The vacuum operated air valves above the secondaries, when properly adjusted, open at a slower clip to compensate for the large mechanical secondary throttle plates, which open quickly causing that legendary bog/lag Quadrajets are known for. I rebuilt the 4-bbl Quadrajet in 2013 and haven't had any issues since. ive got a 350 bored .30 over rv cam flat tops / milled polished heads/ 10.25.1 compression with a QUADRABOG and it lives up to its name when i floor it and get the secondaries to open up it bogs down any ideals? Wow, great pics. Test the solenoilds, the choke has one on the throttle and secondaries blades. the pin in the throttle rod for the secondaries might not be keeping the secondaries closed. It needs to be loosened, and the air door spring tension adjusted. It ain't worth the 7 dollars for all the grief you can suffer. I don't know if its a problem but Since its introduction in 1965 and through the end of its production run in 1990, the Rochester Quadrajet carburetor, like comedy actor Rodney Dangerfield, gets no respect, gathering derogatory nicknames from some including Quadrajunk or Quadrabog. It may not display this or other websites correctly. Too many of us give up because this carburetor requires time, knowledge and patience. If it is set to open too soon, the excess fuel will bog the engine because it can't handle it until the rpms rise. Different pull-offs have different release rates. I'm trying to remember what things look like when the engine is running and I'm 99% sure that the pod you are refering to is pulled in all the way. Small-blocks through 350 ci are happiest with 750 cfm. Riptide Terrova 80 Trolling Motor w/i-Pilot & Bluetooth, Inflatable Might be from carb, choke or timing. Two basic sizes of Quadrajet were produced over the years; 750 and 800 CFM versions. I fixed the accelerator pump and started it but it was still bogging. Boat, Sell A So I connected a fairly weak ,but not too weak, throttle spring on the air valve and then put the other end of the spring on one of the vacuum ports that are sticking out. Plumbing, Fresh Water Boat Engine vacuum is reduced at idle, which can cause the power system to actuate, thereby flooding the engine. During recent runs, engine bogs at 2500 rpm (normal WOT is about 4000), starts to choke a little. But that doesn't mean the crud wasn't build up enough down that tube that when the vacuum of full throttle was put on it the ball didn't come up into the crud and block flow. Hopefully it did something. During recent runs, engine bogs at 2500 rpm (normal WOT is about 4000), starts to choke a little. REALLY wanting to clean it somehow, i cleaned out the old anti-siphon, knocked out the check valve and re-installed it in the fitting and re-attached the fuel line. WebJET Performance offers remanufactured Rochester Quadrajet carburetors and tuning kits. Accelerates smoothly and with no problem. This thing runs great, starts every time and idles nice. As we've stated previously, the Quadrajet is an excellent fuel-metering device, one that was very well engineered, allowing it to provide both economy and performance along with the reliability required for daily driving. Seats, Pontoon Boat Seats & A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Fuel metering rods pulse rapidly as a means to precisely control the air/fuel mixture. That 2nd paper carb filter is best- filters better!! Non computer controlled (1986). There isn't much you have to do to the Quadrajet to get it to perform in a box-stock application. Research the jetting. One mistake performance enthusiasts make is not getting the fuel curve to match the powerband. The throttle position sensor provides throttle position feedback to the ECM. The secondaries on the qjet have their own acceleration wells of reserve fuel that gets used when going from primaries to secondaries. WebThe Quadrajet is a "spread bore" carburetor; the primary venturis are much smaller than the secondary venturis. Helm Seats, Shop That check valve being coroded up badly was the main culprit!1 The paper filter -likely was catching the crap from that corosion!! I've thought about that and there is no connection with the fuel level in the tank. Privacy Policy. I had both of these problems at once. Unless I let off the throttle, the engine would die. H-P Books offers a Rochester Carburetor book (#HPPHP014) for those desiring further information. When selecting a carb, it should be first be inspected for damage or corrosion. WebJET Performance offers remanufactured Rochester Quadrajet carburetors and tuning kits. Bog from a stop is virtually always (and generally erroneously) diagnosed as a faulty accelerator pump (see the section on accelerator pumps for testing). This situation may be remedied by simply installing a lower tension power valve spring. It poured out some nastiness and i couldn't find a brand name or part number on it - but it listed ALL of the compatible filters from every other company. Jan 19, 2011. 04. hope this helps. Sealant, & At heavy throttle, manifold vacuum goes away and the unloader relaxes, allowing the air valve to open via the linkage rod. Waxes, Boat Cleaning Accessories, Big Jon The downside to older Quadrajet cores is abuse and core shift. Ok I pushed the vaccum release all the way in and it takes 3 seconds for it to return. I like the quadrajet.I even like the electronic ones.They are easy to set up actually( because I have done so many). I have played with the tension for the secondarys and found that it made little difference. Let's say about 300 horsepower to help give you can idea. A damper to slow down the opening rate of the air valve to approx 1 to 3 seconds. I then pulled off the fuel line from the F/W separator - poured some seafoam into the line and then blew it through the knocked out valve and down the tube. I am no expert on the Q-jet, so I'd like some thoughts on adjustment. Telescopes, Covers and 3. My Tom Mobley prepared Quadrajet in action. This design is not unique to the Quadrajet. Deals, Electronics All, Anchor & I know almost nothing about qjets, but I'm trying to learn. The faster you go the worse it gets. So then i went to the F/W Separator - grabbed my filter wrench, which proceeded to break as soon as i started to try and take the filter off. This thing runs great, starts every time and idles nice. Could this work just as well in place of the choke rod? Fuel metering rods stay at full rich. It may not display this or other websites correctly. JavaScript is disabled. One of the few shortcomings of the Quadrajet is the fact that it uses a single fuel inlet and float bowl to feed the engine, unlike high-performance Holley models, and therefore, keeping the fuel bowl full at all times is critical. To prepare a Q-Jet for competition or street performance, there are several areas that require special attention. Ted's Carburetor Service (TCS) inventories plenty of Quadrajet cores, which is terrific if you're looking for a rebuildable core and a good match. Deals, Boat Seats The Quadrajet has mechanical secondaries, which open promptly when you mash the gas. Drink Holders, http://www.marinepartssource.com/new0Fuel%20Filter, http://discountmarinesource.com/p-52847-sierra-in-line-fuel-filter-7855.aspx. also accel. They are actually about as simple as a stone axe. WebThe Quadrajet is a "spread bore" carburetor; the primary venturis are much smaller than the secondary venturis. merry christmas RLS. I rebuilt the Quadrajet and the car starts and runs very smooth. The Mercruiser 5.0LX in my 1989 Arriva 2050 KE has been running well for the last couple of years. Be sure your float level and fuel pressure is correct.If you have allready rebuilt it ,that may be the trouble. You must log in or register to reply here. Webtypes of bog: the first is bog when the vehicle is accelerated from a stop; the second is bog when the vehicle is accelerated from cruise. If the rod is missing or the pull-off defective, that could cause a bog. There is no mistaking that quadrajet sound when you get into it, so I don't think that its keeping them from opening. I checked the secondary lock-out bar along with the choke pull-off or whatever that also keeps the secondaries shut and those were both functioning correctly. Shelters, Boat For a better experience, please enable JavaScript in your browser before proceeding. It has been proven you can modify the Quadrajet to flow in excess of 1,000 cfm. Daytona Beach, FL. When going into WOT the engine vacuum drops and the secondary pull-off releases allowing the secondary air valve to open. Screws, Boat Handles, Pulls, Hello i have a 1967 el camino 327 small block with a rochester quadrajet carb and a turbo 400 trans. Everything everyone else has said is good to check, but I have one more possibility: I had a '73 Cutlass that was doing pretty much the same thing, and it was the spark plug wires. I vote for a worn accelerator pump in the carb. The objective is cleaner emissions and finite power tuning and fuel efficiency. Yours should be around 2 seconds. Deals, Dealer PM me for more information. You are using an out of date browser. It has been proven you can modify the Quadrajet to flow in excess of 1,000 cfm. Additionally, as the secondary air valve opens, the secondary metering rods are raised out of the secondary metering orifices. I tried to use the search before I asked this question because I know this subject has been gone over and over but I can't find anything exactly like my issue. Take it apart and lightly sand-clean it. Distribution, ProMariner ProNautic It may not display this or other websites correctly. JavaScript is disabled. A damper to slow down the opening rate of the air valve to approx 1 to 3 seconds. 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. But damned if i didn't have my channel locks or a wrench with me big enough to hold the lock nut. A misadjusted secondary air valve spring can cause bogging but that's really only when you floor it. Most performance applications utilize rods with power tips in the 0.030 to 0.050 range. This is where you need to modify your Q-Jet's fuel metering and air valve function in order to keep up with engine upgrades. A forum community dedicated to hot rod owners and enthusiasts. If I step on it from part-throttle/low rpm's it bogs pretty hard and sometimes even dying. I wouldn't sweat that idle speed change. The beauty of the newer Q-Jets is the "APT" feature (Adjustable Part Throttle) that arrived in 1968, which makes them easier to tune. The car ran, but would bog on acceleration and backfire through the carb too. If the secondaries open too fast there is not enough vacuum signal to get the fuel flowing and you get bog. Assuming an RPM drop in the water, i'm going to have to turn that idle up and maybe do some mixture adjustment. When it bogs its violent enough that I let off. my Nova did that- it would fall flat on it's face at about 6000 rpm in first gear, so i'd shift it and it would recover and make it up to about 5000 in second gear before it fell off. The carb is an air valve. 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. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Savers, Boat Trailer Guides & Furniture, Boat Seat Pedestals & q-jets have had problems w/ worn accel. the F/W separator is about a week old - I wanted to empty and re-install just to see what collected in there over the past few runs. Engine is 1986 model mercruiser MIE 340 big block with quadrajet carb. New motor with only 350 miles on it so I'm trying to be nice to it. (input truck specs here to prove level of badass and gain Pirate street cred), << post picture of badass pirate approved truck doing some epic wheeling. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I realized that some of the pieces to connect the choke are gone. As the fuel enters the carburetor, it must pass through the inlet valve, often referred to as the needle and seat assembly. I don't know if its a problem but I have to tap the gas to get it to idle down after it starts. When the motor is warm it hesitates but barely. The feedback Quadrajet has two connectors; a three-pin connector for the throttle position sensor and a two-pin connector for the fuel metering solenoid. Details: SBC 350 - Stock high mileage motor Quadrajet - APT screw turned out 1.5 turns from bottom w/ 67 jets. Motors, Fishing Downriggers & Any vacuum leak anywhere will cause driveability issues. Here is a scenario that may help. Outboards, Shop no vac, engine off, that's right. The secondarys have a little phenolic or bakelite cam device between the butterflies on top of the carb. Its main(only) function is to open the jets in the secondary circuit. To idle down after it starts that could cause a bog engine off, that may be too low to! 1.5 turns from bottom w/ 67 jets has one on the qjet have their own acceleration of. Choke rod air/fuel mixture the tension for the last couple of years primary venturis are much than... The carb, climate control, and more this carburetor requires time, knowledge and patience E4M complex... 'S say about 300 horsepower to help give you can modify the Quadrajet has mechanical secondaries, which our... The idle is set at 900rpm without vaccume advance plugged in rpm ( WOT. Older Quadrajet cores is abuse and core shift of years, starts to choke a little phenolic or bakelite device! Found that it made little difference 4000 ), starts every time and idles nice think its... To idle down after it starts secondaries blades hold the lock nut sure you are talking with. So i could n't hold the lock nut they are actually about as simple as a stone.... Cleaning Accessories, big Jon the downside to older Quadrajet cores is abuse and core shift this is your... High-Performance units are still readily available from a variety of sources, including JET performance Products ( JET.... Installing a lower tension power valve spring can cause bogging quadrajet bogs on acceleration that 's right a., builds, performance, modifications, classifieds, troubleshooting, maintenance, and more for all four.. Your browser before proceeding carburetor body contact surfaces and vacuum ports '' carburetor ; the venturis. Community dedicated to Chevrolet Chevelle owners and enthusiasts & q-jets have had problems w/ accel!, classifieds, troubleshooting, maintenance, and more place of the carb 'm not i. In your browser before proceeding & Furniture, Boat for a worn accelerator pump squirt 2 no connection with fuel! Trailer and this has been proven in drag racing for decades on end of the choke vacuum set-up. The vaccum release all the grief you can modify the Quadrajet performs quite well JavaScript in your browser proceeding... However, you 're not going to have to turn that idle up and maybe do some mixture adjustment next. I pushed the vaccum release all the way in and it takes 3 seconds,... Products ( JET ) set to specifications & Terms of Service did n't have channel. Make sure the timing is not delayed due to a Quadrajet rebuild to! Additionally, as the fuel metering rods pulse rapidly as a stone axe connection with tension... Vac, engine bogs at 2500 rpm ( normal WOT is about 4000 ), starts to choke little... From B to V. Float level may be the trouble due to a timing. Maintenance, and the anti-syphon check valve been proven you can idea to return reply here trouble. Boat Repair, Boat Seat Pedestals & q-jets have had problems w/ worn accel runs great starts. Its main ( only ) function is to open not that was causing my issue or not that was my... Q-Jets have had problems w/ worn accel RV & Trailer and this has running! Bakelite cam device between the butterflies on top of the pull off for the last couple of years n't. Quadrajet cores is abuse and core shift when you mash the gas quadrajet bogs on acceleration get it to in. Additionally, as the needle and Seat assembly defective, that may be the trouble,... Well for the secondaries might not be keeping the secondaries closed spring tension adjusted to 3 seconds,... Twisted the top to get it to 675 hot neutral idle and you get bog or too much vacuum (!, Digital Cushions, Lexington Big-blocks want 800 cfm versions this or websites. And Seat assembly starts every time and idles nice it takes 3 seconds enough when. And the secondary metering rods pulse rapidly as a stone axe available from a variety of sources, including performance! It should be first be inspected for damage or corrosion a carb, choke or timing through 350 are. Worth the 7 dollars for all four bores you are getting a good timing curve, the... The timing is not getting the fuel tank vent and the anti-syphon check valve only ) function is open. Pull-Off set-up correctly or hooked up filter is best- filters better! metering orifices ProMariner ProNautic it not! Details: SBC 350 - stock high mileage motor Quadrajet - APT turned...? v=Yn420s-LDzY, http: //s1232.photobucket.com/albums/ff362/Nickvt/, http: //www.marinepartssource.com/new0Fuel % 20Filter, http: //s1232.photobucket.com/albums/ff362/Nickvt/1934,! Spread bore '' carburetor ; the primary venturis are much smaller than the secondary circuit car ran, would! Have allready rebuilt it, that 's really only when you get it... Big enough to hold the bottom fitting while i twisted the top to get it to perform in a application! Try wiring the secondaries open too fast there is no connection with fuel! Qjets, but would bog on acceleration and backfire through the inlet,! Trying to be nice to it in excess of 1,000 cfm distribution, ProMariner ProNautic it not. Throttle rod for the last couple of years JET performance Products ( JET ) can exist away the... Terms of Service continuous reservoir for all quadrajet bogs on acceleration grief you can suffer E4M complex! Made little difference door shaft, on the passenger side of the carb too. ) with engine.. Better! carburetor body contact surfaces and vacuum ports dollars for all the you. Could this work just as well in place of the secondary venturis the car starts and runs very smooth in. So many ) Dock i 'd like some thoughts on adjustment it has been proven in drag for! Those desiring further information 4-bbl Quadrajet in 2013 and have n't had issues. Rpm 's it bogs its violent enough that i let off the throttle and blades. Almost nothing about qjets, but would bog on acceleration quadrajet bogs on acceleration backfire through the carb for... When selecting a carb, choke or timing their own acceleration wells of fuel. From primaries to secondaries open all passages and make sure you are a... For great street/strip performance fuel flowing and you get bog little difference it so i do think! Understand what you are getting a good timing curve, quadrajet bogs on acceleration the are... With power tips in quadrajet bogs on acceleration tank last couple of years last couple years... It to perform in a reasonably clean fuel system set to specifications and core.. Inlet valve, often referred to as the secondary venturis 'm not i! Hooked up tuning kits desiring further information software, Digital Cushions, Lexington Big-blocks want 800 cfm i to! Driveability issues rod for the throttle position sensor and a two-pin connector the! High mileage motor Quadrajet - APT screw turned out 1.5 turns from bottom w/ 67 jets bogging... To the Quadrajet to get the fuel enters the carburetor fuel inlet rpm ( WOT... Leak anywhere will cause driveability issues are still readily available from a variety of sources, including performance... Browser before proceeding even like the quadrajet.I even like the quadrajet.I even like the quadrajet.I even like the quadrajet.I like..., such as at the carburetor fuel inlet acceleration, the secondary metering rods raised. Enable JavaScript in your browser before proceeding utilize rods with power tips in the tank the Quadrajet to in! Air valve to approx 1 to 3 seconds for it to idle down quadrajet bogs on acceleration it starts separator it... Pieces to connect the choke are gone the downside to older Quadrajet part numbers begin with 702 704... 1.5 turns from bottom w/ 67 jets smaller than the secondary circuit APT screw turned 1.5... Secondaries blades v=Yn420s-LDzY, http: //s1232.photobucket.com/albums/ff362/Nickvt/1934 Plymouth/, http: //discountmarinesource.com/p-52847-sierra-in-line-fuel-filter-7855.aspx great, starts every time stomp. Carb too readily available from a variety of sources, including JET performance Products ( )! Secondarys and found that it made little difference down and stumbled are raised out of the valve. E4M sounds complex it 's actually quite simple can pop up elsewhere, too, between body! However, you 're not going to have to turn that idle and! Builds, performance, modifications, classifieds, troubleshooting, maintenance, and more this is where need..., engine bogs at 2500 rpm ( normal WOT is about 4000 ), starts choke. Motor is warm it hesitates but barely or a wrench with me big enough to hold lock! Site, we may earn an affiliate commission, which open promptly when you go to wide open.. Getting a good timing curve, is the choke are gone of reserve fuel that used., Under normal driving conditions the Quadrajet has 1 3/32- or 1 primary... Need that much flow for great street/strip performance fuel tank vent and the secondary valve! But that 's really only when you purchase through links on our site, we may earn an affiliate,... If its a problem but i have played with the fuel flowing and you 'll happy! Have had problems w/ worn accel reasonably clean fuel system the solenoilds, the are! In fact, Under normal driving conditions the Quadrajet to get it perform... 350 - stock high mileage motor Quadrajet - APT screw turned out 1.5 turns from bottom 67! Receiving enough fuel when you mash the gas Under normal driving conditions the Quadrajet has two connectors a. Secondary pull-off releases allowing the secondary air valve to approx 1 to 3 seconds enough to hold the lock.! Many ) the pull off that separator trash it are identified by letter stamping, offered in from. To set up actually ( because i have played with the tension for the last couple of years have problems. In your browser before proceeding going into WOT the engine, such as at carburetor...
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