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1991 GMC Jimmy Carbonmoxide

Tiny
KFORD5566
  • MEMBER
  • 1991 GMC JIMMY
Smells problem
1991 GMC Jimmy Four Wheel Drive Automatic 113000 miles

AS my Jimmy warms up after 15 minutes, it starts to smell like carbonmonoxide. Possible answer?

It also recently started to smoke and that is when the smell started

Thanks

Kathy
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Tuesday, December 2nd, 2008 AT 1:13 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
High CO readings indicates that the fuel mixture is too rich. Possible causes might include:

Flooded charcoal canister or a leaky purge valve;

Defective mass airflow (MAF) sensor, manifold absolute pressure (MAP) sensor, or vane airflow meter (VAF); or

Defective throttle position sensor.

If the feedback fuel control system is working properly and there are no apparent sensor or purge valve problems, the catalytic converter may be contaminated or not functioning.
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Tuesday, December 2nd, 2008 AT 5:59 AM

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