CHEVY IDLING ISSUE

1987 Chevrolet Suburban

Tiny

Pascua

September, 29, 2010 AT 7:13 AM

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.

3 Answers

Tiny

Wrenchtech

September, 29, 2010 AT 7:16 AM

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

Tiny

redwhite

October, 16, 2010 AT 10:25 AM

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

Wrenchtech

October, 16, 2010 AT 10:38 AM

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

Please login or register to post a reply.

Vacuum Leak Test and Repair - All Cars
Clean Idle Air Control Ford Super Duty 5.4L
Easily Clean Your Throttle Bore Like a Pro
 Step by Step video GMC Yukon XL 2000-2006