Loping idle lean fuel mix on left bank & right bank?
FRANK HERDMAN
MEMBER
2001 CADILLAC DEVILLE
V8
FWD
AUTOMATIC
75,000 MILES
Trouble code lean fuel mix on left bank & right bank. Have replaced iac valve & tp sensor. Also has a loping idle. Replaced all 3 oxygen sensors, pcv valve & spark plugs. Still have loping idle. Idle rpms are 575-650. Vacuum psi 19 steady.
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Wednesday, December 12th, 2007 AT 7:38 PM
2 Replies
BLACKOP555
MECHANIC
10,371 POSTS
The lean bank code usually means a bad O2 sensor, replace and your problem shoudl go away.
Can you provide with the codes?
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Wednesday, December 12th, 2007 AT 8:23 PM
KEN L
MASTER CERTIFIED MECHANIC
47,256 POSTS
I don't think so, it sounds like the fuel pump is going out or the fuel filter needs to be replaced, here is the location of the fuel filter and a guide to help you understand what the problem is.