1991 Pontiac Trans Am idle problem

1991 PONTIAC TRANS AM
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JOE.MORENO
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Engine Performance problem
1991 Pontiac Trans Am V8 Two Wheel Drive Automatic

I have a 1991 firebird with a 5.7 liter automatic tunned ported injected.The question i have is.
When I turned on the key there is no engine service light.When I crank the car it runs okay until it warms up once it warms up the car idle and rpms start hunting?
Jul 12, 2010 at 2:12 AM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
Check under the hood for a fuse box, look for the cigar fuse, and any marked ign or pcm, ecm. one of these should get the service engine light back on.
Jul 12, 2010 at 2:27 AM
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