1990 Pontiac Grand Am running terrible

Tiny
BABYGIRL2800
  • 1990 PONTIAC GRAND AM
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES

Its running terrible and when you hit the gas it will backfire I changed the quals and everything thats not it I have no idea what it could be got any suggestions

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Tuesday, June 24th, 2014 AT 3:09 AM

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Tiny
HMAC300
  • EXPERT
  • 45,785 POSTS

Scan for codes and check fuel pressure with a gauge first autoparts rent the gauge. Then check compression and look for a vacuum leak

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Tuesday, June 24th, 2014 AT 6:00 AM

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