Mechanics

IDLE WITH A/C ON

1987 GMC Sierra

Engine Performance problem
1987 GMC Sierra 6 cyl Two Wheel Drive Automatic 270000 miles

my truck idle starts to slow until my truck dies when I stop like at a red light. Or any time I stop, I can keep it running by shifting to neutral what is this/
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Barecat6885
March 2, 2009.



Check the idle air control valve/throttle position and manifold absolute pressure sensor/PCV and EGR valves to include a fuel pressure test

Rasmataz
Mar 2, 2009.