Mechanics

CHEVY IDLING ISSUE

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.
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Pascua
September 29, 2010.




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

Wrenchtech
Sep 29, 2010.
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

Tiny
Redwhite
Oct 16, 2010.
Please start a new question of your own. We can't follow 2 vehicles in the same thread.
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Wrenchtech
Oct 16, 2010.

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