Mechanics

CHEVY IDLE

2000 Chevrolet Suburban

Engine Performance problem
2000 Chevy Suburban V8 Four Wheel Drive Automatic 98000. Miles

I had a code reader ran on the vehicle, it said the mass air flow senor & and the idle air control valve were bad, I have replaced both, but in cold weather it wont idle smooth, it just hunts back and fourth, but if I unplugg the mass airflow sensor it will run fine, I looked at the wires for the mafs, they appear to be ok, do you think the mafs could be bad, it was a reman. Thanks for your time.
Avatar
Debuse
November 18, 2009.




Hi
Would you post code in P0xxx format? That will help in diagnosis
Thanks for donate
AD

Docfixit
Nov 18, 2009.
Cant dont have the code

Tiny
Debuse
Nov 18, 2009.
Most times when MAF disconected and idle good is a faulty crankshaft sensor that does not set code but causesMaf to set. Located right side block above starter. An Auto Zone will pull codes free.

Docfixit
Nov 18, 2009.

AD