1988 Chevy Trailblazer back fireing and high idle

1988 CHEVROLET TRAILBLAZER
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JACKIE BYRD
  • MEMBER
  • 1 POST
Engine Mechanical problem
1988 Chevy Trailblazer 6 cyl Two Wheel Drive Automatic

When I start the motor it is at a high idle and then it goes to a slower idle then back fires in the throtle body and motor dies
Sep 7, 2010 at 9:02 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Clean out the idle air control valve and test the throttle position and manifold absolute pressure sensors and also check the fuel pressure and look for vacuum leaks-
Sep 7, 2010 at 11:37 AM
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