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2000 Chevy Suburban idle

Tiny
DEBUSE
  • MEMBER
  • 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.
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Wednesday, November 18th, 2009 AT 2:50 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Would you post code in P0xxx format? That will help in diagnosis
Thanks for donate
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Wednesday, November 18th, 2009 AT 3:08 PM
Tiny
DEBUSE
  • MEMBER
  • 2 POSTS
Cant dont have the code
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Wednesday, November 18th, 2009 AT 4:06 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
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.
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Wednesday, November 18th, 2009 AT 4:30 PM

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