1990 GMC S15 Vehicle stalls and dies when in gear.

Tiny
JOHN_FOWLER
  • MEMBER
  • 1990 GMC S15
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
I have changed the spark plugs, wires, distributor cap, rotor, EGR valve, IAC valve, rebuilt the TBI with a rebuild kit. The truck has a rough idle when the AC is on. The RPM's will increase and decrease until the engine dies. The idle is smooth when the AC is off. When you put in drive with the AC on, the engine dies. It will also die at stop signs and lights while driving. Do you have any idea what the problem might be?
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Friday, June 26th, 2009 AT 8:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked the throttle position sensor?
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Wednesday, July 1st, 2009 AT 6:36 PM

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