Rochester quadrajet issues

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Aug 25, 2009 · I purchased a rebuilt, numbers-correct Rochester Quadrajet 4MV for my 74 Corvette to replace the replacement Holley ecomomaster that came on the car. The car ran very well with the Holley initially ... Re: Adjusting Rochester Quadrajet secondary--Update--I have asked the exact question before and there are postings with the answer specifically quoted out of the manual. It a simple seting. Release the tension. turn the spring just enough to touch the choke plate closed and then like 1 turn more, tighten set screw. Oct 10, 2016 · The Quadrajet has 1 3/32- or 1 7/32-inch primary throttle bores with either 750 or 800 cfm. It has been proven you can modify the Quadrajet to flow in excess of 1,000 cfm. Hello All! I have a no start issue again with my 76 FWB. When I got the car last month I had to replace the fuel pump and the gas tank. It started and ran fine. The car sat for like 4 days afterwards. I then put in a hot battery and attempted to start it and all it did was crank with no start. I... The car starts and idles fine. I've been driving it, and if you accelerate slowly or just average, like getting into traffic, it's fine. Accelerates smoothly and with no problem. 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. It's a QuadraJet. OK its not a monteSS.I have a 1981 Chevy C30 cubevan we use for our band.Its a got a 350 w/ a remanufactured Q-jet on it.Everytime I go to start it in the cold,I pump it twice it fires right up then stalls.It pulls these antics like 10-15times befor it will run.If I try to keep it running ... Is the fast idle screw on a quadrajet the 1 near the choke on an angle where you put the phillips head screwdriver onto it, or is the fast idle screw the 1 on the bottom of the carburetor near the front down low. I think I was playing with the wrong screw when I popped the air cleaner off. Does anyone have a picture. Re: Rochester Quadrajet - Wed May 30 2018 10:46 PM There is no "one answer fits all questions". If you plan to use the truck as a tow vehicle to tow a heavy trailer, then a square-bore genuine Carter AFB or Holley. remote-choke-rochester-quadrajet. I rattled around in my parts bin and found this old girl for you. This is a remote choke Rochester Quadrajet carb. In this photo, I’ve numbered the offset choke valve operating linkage (1.), the fast idle cam (2.), the remote intake mounted choke thermostatic spring (3.), and the choke pull-off (4.). The car starts and idles fine. I've been driving it, and if you accelerate slowly or just average, like getting into traffic, it's fine. Accelerates smoothly and with no problem. 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. It's a QuadraJet. A common problem with Quadrajets is a misadjusted choke spring. If the spring tension is too loose, the choke will open prematurely and the engine will either stall or be very balky when cold. If the spring is too tight, the choke will stay engaged too long and richen the mixture while keeping the engine at fast idle. PHOTO 8 Jul 01, 2011 · Rochester drilled several passageways through the Quadrajet casting during the manufacturing process. Aluminum, brass, or lead plugs, depending upon the year and location, were used to seal the ... 201355 JET Electric Choke Conversion Kit #201355 Add to cart. Add To Wishlist The carburetor you pictured is a Rochester 4GC, not a Quadrajet. The Quadrajet was only available on the Riviera starting in 1966. It's a totally different kind of carburetor. Extremely small primary and extremely large secondary throttle plates. Because of this arrangement, it's called a 'spread bore' carburetor. The car starts and idles fine. I've been driving it, and if you accelerate slowly or just average, like getting into traffic, it's fine. Accelerates smoothly and with no problem. 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. It's a QuadraJet. May 07, 2012 · Got a brand new (rebuilt) rochester quadrajet carburetorinnstalled and it is revving high. Adjusted idle scree and - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. Sep 19, 2005 · Carburetor, Quadrajet Stage 1, 800 cfm, 4-Barrel, Spread Bore, Single Inlet, Dichromate, Each Check to make sure this part fits your application Restore your car's factory performance. Replace your tired, worn-out Rochester Quadrajet and restore your car to factory stock performance with one of these JET Streetmaster Quadrajet Stage 1 carburetors. Jul 01, 2011 · Rochester drilled several passageways through the Quadrajet casting during the manufacturing process. Aluminum, brass, or lead plugs, depending upon the year and location, were used to seal the ... Jul 28, 2016 · ROCHESTER QUADRAJET INSTALLATION ROCHESTER QUADRAJET INSTALLATION These instructions cover all QUADRAJETS. All carburetors are installed on our test engine prior to shipping. adjustment screw to loosen or tighten as necessary. It will take some experimentation to determine ... Oct 13, 2016 · CARBURETORS/FUEL INJECTION/FUEL PUMPS/PARTS Holley-Vacuum Secondary spread bore- “general” Rochester Quadrajet replacement [non computor] Holley 650 cfm 4 clear view sight plugs are fitted to make float level adjustment linkage is fitted as standard, two corner idle system with lightweight mixture screws ... Find SA Design How to Rebuild and Modify Rochester Quadrajet Carburetors SA113 and get Free Shipping on Orders Over $99 at Summit Racing! SA Design's How to Rebuild and Modify Rochester Quadrajet Carburetors is a complete guide to selecting, rebuilding, and modifying the Q-Jet and is aimed at both musclecar restorers and racers. It includes a history of the Q-Jet, an explanation of how the ... QJ Throttle Solenoids, Dash Pots - Carburetor Parts & Kits for Rochester, Carter, Holley, Edelbrock, Ford Motorcraft QJet, 4G, 2G, Mercarb Marine, AFB, AVS Thermo-Quad Carburetors JavaScript seems to be disabled in your browser. Quadrajet 4 MC, 4 MV Carburetor Trouble Shooting E4MC, E4ME Adjustment Procedures I have a Rochester Quadrajet Marine Carburetor #17059286. It appeared to be flooding at idle and the fuel was leaking excessively from the throttle body linkages (on both left & right side). Hello. Trying to figure out what jets/needle/seats are needed . Back when G.M. 350's made 345hp they were rated in gross h.p. The engine in question is a Crate 350 rated at 345hp. but doesn't list if g.m. rates their crate engines in the later net hp or the old gross rating. If the crate engines are rated in the net rating The following information covers how to decode your Rochester Carburetor: The carbs are found in two forms, one produced prior to 1976, one produced after 1976. Examples of each form are as follows: Pre-76. Example: 7028219 DG1938 . 70 2 8 2 1 9. DG 193 8 . 70 - Prefix code. "70" will appear on all late '60's Rochester Carburetors. OK its not a monteSS.I have a 1981 Chevy C30 cubevan we use for our band.Its a got a 350 w/ a remanufactured Q-jet on it.Everytime I go to start it in the cold,I pump it twice it fires right up then stalls.It pulls these antics like 10-15times befor it will run.If I try to keep it running ... The Quadrajet is a 4 barrel carburetor made by the Rochester Products Division of GM that was first used on the Chevrolet 396 Mark IV engine in 1965 then widely used on General Motors motor vehicles until 1990. Its last application was on the Oldsmobile 307 V8 engine, which was last used in the Cadillac Brougham and full size station wagons made by Chevrolet, Pontiac, Oldsmobile, and Buick. Also if you are using the in-carb filter as well as an inline filter this may cause fuel starvation issues with the quadrajet. Yes is sounds silly but the double filtering actually cuts the pressure down causing issues, sounds goofy but have had expperiences with it and once in line filter was removed problem was gone. Good luck and keep us ... Get the best deal for Car & Truck Quadrajets Carburetors from the largest online selection at eBay.com. Browse our daily deals for even more savings! Free delivery and free returns on eBay Plus items! 1965 gm introduces the rochester quadrajet, the carb shop opens, we grew up together.. His shop,as you can see inside, is equipped with the latest state-of-the-art diagnostic equipment His is the only shop to have a " Bench Dyno ", which he built himself, to test every carburetor under various driving conditions ! It is a R4-M4MC the M4MC is a Hot air side mounted choke Rochester Quadrajet 4 barrel carburetor, which means the choke is located on the passenger side connected to the carburetor and draws hot air from the intake .They started making them in 1975 and ran threw 1990. May 06, 2013 · Q: I have seen numerous Rochester Quadrajet carburetors that have a leak down problem when the car sits idle for a day or more. My question is, how is the gas getting out of the float bowl, and how do you fix it? I have this problem with the Q-Jets on my 1972 Electra and 1986 Chevy pickup. A: There are two things that can cause a Quadrajet to leak. A common problem with all Quadrajets is throttle-plate bushing wear, which leads to an air leak around the throttle shaft, causing an unstable idle; this can be repaired by a specialty shop. Another malady is a warped air horn. Also if you are using the in-carb filter as well as an inline filter this may cause fuel starvation issues with the quadrajet. Yes is sounds silly but the double filtering actually cuts the pressure down causing issues, sounds goofy but have had expperiences with it and once in line filter was removed problem was gone. Good luck and keep us ... The Quadrajet is a 4 barrel carburetor made by the Rochester Products Division of GM that was first used on the Chevrolet 396 Mark IV engine in 1965 then widely used on General Motors motor vehicles until 1990. Its last application was on the Oldsmobile 307 V8 engine, which was last used in the Cadillac Brougham and full size station wagons made by Chevrolet, Pontiac, Oldsmobile, and Buick. May 02, 2019 · The Quadrajet by GM's Rochester Products Division is arguably the most popular carburetor ever produced. Introduced with Chevrolet's new 396ci big-block for '65 and widely used by all GM divisions ... Dec 12, 2009 · We replaced the choke thermastat on this rochester carb(#17057262) and still have trouble with it starting up when it's cold. It will cause two black soot spots on the driveway(as well as alotta condensation).