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2002 GMC Envoy Envoy rmp up and Dawn

Tiny
ING_ENRIQUE16
  • MEMBER
  • 2002 GMC ENVOY
  • 125,000 MILES
When start the envoy for first time in the day the envoy almost die and rmp up almost 2000
and dawn up to 800 for 1 minute and stabilize and run without problem, the engine light is on
i changed the intake manifold gasket
Monday, July 22nd, 2013 AT 7:11 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It sounds like either a vacuum leak or an issue with the idle air control valve (IAC). The IAC is responsible for maintaining the vehicle idle. If the check engine light is on, you should have the computer scanned to identify what trouble codes are present in the system. Most parts stores will do it for free and most parts stores will do it for free.
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Monday, July 22nd, 2013 AT 8:34 PM

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