1987 GMC Sierra idle with a/c on

1987 GMC SIERRA
270,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BARECAT6885
  • MEMBER
  • 1 POST
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/
Mar 2, 2009 at 2:50 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the idle air control valve/throttle position and manifold absolute pressure sensor/PCV and EGR valves to include a fuel pressure test
Mar 2, 2009 at 3:18 AM
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