1987 CHEVY SUBURBAN IDLING ISSUE

  • Tiny
  • Pascua
  • 1987 Chevrolet Suburban

Engine Performance problem
1987 Chevy Suburban V8 Four Wheel Drive Automatic 150k miles

My 1987 Suburban will not maintain a steady idle and a miss at idle. It idles up and down, but when driving it runs great. I suspected a vacuum leak, checked and no leak found, replaced air intake valve, map sensor, spark plugs and wires, egr valve, changed throttle body and gasket.
Any help would be greatly apperciated.

Wednesday, September 29th, 2010 AT 7:13 AM

3 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,812 posts

They had a lot of problems with the throttle bodies on those with leakage in the base, sometimes from the EGR and sometimes vacuum.

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Wednesday, September 29th, 2010 AT 7:16 AM
  • Tiny
  • redwhite
  • Member

Same problems with mine. No vacuum leaks, acts as if it would flood itself out. I also change the map sensor with no change need help

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Saturday, October 16th, 2010 AT 10:25 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,812 posts

Please start a new question of your own. We can't follow 2 vehicles in the same thread.

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Saturday, October 16th, 2010 AT 10:38 AM

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