SPONSORED LINKS

Loping idle lean fuel mix on left bank & right bank?

Tiny
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.
SPONSORED LINKS
Wednesday, December 12th, 2007 AT 7:38 PM

2 Replies

Tiny
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?
Was this
answer
helpful?
Yes
No
Wednesday, December 12th, 2007 AT 8:23 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,505 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.

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Fuel pressure should be

Key On Engine Off 41-47 psi

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Check out the images (below). Let us know how it goes.

Images (Click to make bigger)
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, August 27th, 2024 AT 2:01 PM

Please login or register to post a reply.

Related Idle Air Control Replace/Remove Content

Idle Air Control Motor Replacement
GUIDE
Idle Air Control Motor Replacement
The idle air control motor or idle speed control motor is designed to adjust the air flow into the intake manifold at engine idle. Engine idle speed is monitored by the PCM...
VIEW MORE

Sponsored links