I decided to pull the plugs on the car the other day. I wasnt very happy with what I found. The entire left bank plugs were extremely lean and the right bank plugs looked great! Im kinda confused! What could cause this?
Whats wrong?
- Thread starter egan_gt
- Start date
BK_CAULEY
it's built for speed not longevity, woman
im not sure what could cause an entire side to do it, if it was just one i would think it was a bad injector.
PUNISHER RACING
Active Member
Just for the heck of it I swapped O2 sensors. I havent had a chance to see if it made a difference. I dont believe an A9L reads side to side though. It really boggles me. I havent seen this issue before?
PUNISHER RACING
Active Member
ok, thanks for the help guys. Im going to pull the plugs tonight and see if its the opposite with the right bank lean and the left bank lookin good.
302RollinHard
New Member
The A9L does read each side indepentantly. I would bank on the one on the lean side is bad. May as well change both, while you are in there, the "good one" is probably on borrowed time.
I do believe they are the stock O2's from 1986 with 75,000 on them now. Hopefully it'll be that easy of a fix. If it did change, I'll just change both to be on the safe side.
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