CarburetorsCarb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.
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i pulled a 305 out of an 85 caprice classic, and am rebuilding the stock carb. it's the rochester quadrajet, but i cant figure out how to tell which rebuild kit to order for it and believe it or not the chilton manual actually turned out to be useless for me this time. I'm pretty sure it's the E4ME though. also, the top of the pistons told me this was running rich. how do i lean it out? which screw is it?
if its the computer one still then yea its the E4ME
all you need is the stamping numbers off the side of the carb for the auto parts store to get you the kit
its really simple and easy
and the carbs are real simple and straightforward to disassemble
the hardest part really is punching the roll pin far enough to get the accelerator pump arm off, and also reinstalling the primary needles and hanger and piston
it is real tricky lining them up down through the phenoly spacer holes
these carbs are really simple otherwise
the kit comes with exploded view diagram and listing of all the parts names
all you need are the stamping numbers off the carb
search google, as there are lots of pics and pages of info out there on these carbs,and pagesof modifications and improvements too
but more can be found in Q Jet books published by a couple different authors, local library may have one possibly
but ive never used any manuals or books, i learned by grabbing tools and taking it apart, done tons of them now, most turn out fine, but some wont, and some have worn out throttle shaft bushings and require a press to replace them
if you dont then youll have a vacuum leak it wont run right if the shaft is sloppy
good luck
__________________ IM or text me 217 671 7792 i don't check forums often!! fastr68 on yahoo msngr anytime! 1982 Trans Am HT WS7 - i have no F-body cars any more- i still do have many '82 to 84 AND '85-up bird and camaro parts and parting out 1991 S10 also all pieces blue colorCo-Founder of the Early Bird Club(82-84)
Last edited by Randy82WS7; 07-02-2007 at 02:56 PM.
thanks man. i was also wondering how to lean it out... all the chilton told me was to leave it to a licensed professional. which screw would be the one i want?
As for a "screw" to lean it out - there isn't one. It's a feedback system, meaning it sets the mixture at a certain place, the O2 sensor sees what the result is, sends that info to the computer, the computer changes the mixture based on the sensor "feedback", etc., etc.
The typical causes of running too rich are: Bad O2 sensor (but not bad enough to set a trouble code); improperly functioning choke; leakage through the "well plugs" from the fuel bowl to the intake manifold; and ignition not up to par.
I just purchased a boat with a 90 Q jet on it (90 260HP 350 CI Mercruiser). I know theres no computer or anything but its in need of a rebuild big time. Would the diagrams I see here be there same - some computer components?
