Quadrajet Problem Solving > Quadrajet Parts and Numbers
Q-jet code confusion
Cal86cutty:
Hi folks new here to the site -hope to gain valuable info on the Q-jet. I've been a G-body fan for a lot of years owning a number of Cutlass' and Monte's. Presently own an 86 Cutlass Supreme and an 87 Monte Carlo SS - so am familiar with the Rochester Quadrajet Carb.
I've recently been having problems with the carb on the 86 Olds. My mechanic has checked it over and said it is shot - he checked on getting a re-build kit for it but said there wasn't one available ( or he isn't trying hard enough to find one! ) Anyway - I removed the carb and have been trying to find a replacement . The first one I tried was off an 88 full size chev ( I kind of knew this one wouldn't work with it having different ecm plug ins ) . The engine fired right up but was running really rough - knew it wasn't right.
The second one is off an 86 GMC truck with a V6 ( code - 17085210 ) All connections the same except for the throttle linkage is different. The car fired right up at first and idled fine but was running really rich and was stumbling a bit - I could drive it around the block but felt it wasn't quite right. After a few days I couldn't even get it started- so still looking!
Sorry about the long intro to the question at hand! Q-jet code confusion. The first carb, that is apparently shot, has a code of 17086590 - All translates fine except for the 7th digit '9'. I've seen a listing for the division up to the digit '8' but nothing for '9'.
This is a Canadian built Cutlass - would that have any bearing on the number. Any help greatly appreciated. thanks Murray
Ethan1:
Welcome to CHP!
I believe you may be correct, as I see, a few Canada Export Quadrajet's from time-to-time with an odd second to last digit. So, this may be a Canada or overseas deal here. That carb was for an '86 Buick, Olds, and Pontiac Models w/ 305cid, A/T car. Any photos of it?
Ethan1:
To add, it was also used on the '85-'87 Chevrolet/GMC Pickups as well. ;)
Cal86cutty:
Thanks for replying Ethan - I've attached a couple of photos of the carb. The one I installed on the engine is the 86 qjet off the 86 Pick-up . The carb is a close match to the original carb except for a couple of differences - one being the throttle linkage and the other is how the primary vacuum hose from the pull off attaches to the body. A little different set up but don't know if that makes a difference.
The electronics seem to be the same with the correct connector for the mixture control solenoid and no external 3 pin throttle position sensor. Is there any reason why this carb. shouldn't work? thanks for the help. Murray
Ethan1:
Not sure why they wouldn't. Cliff would be best to answer. May try posting in the correct forum above. Might need some modifying to work properly.
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