1993 Pontiac Grand Car Running Smooth Park Shut Off Gear Changed 3 Ignition

1993 PONTIAC GRAND AM
22,500 MILES
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ANONYMOUS
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Car was running smooth in park but shut off in gear. Changed all 3 ignition coils, oxygen sensor, tps, mass air flow sensor, and idle air control valve now it run rough in park and smooth in gear.
Oct 22, 2012 at 2:25 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
scan for codes and check fuelpressure. when an iac is replaced you have to drive 40 mph for it to reset.
Oct 22, 2012 at 2:30 PM
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