1994 Pontiac Bonneville rough running

1994 PONTIAC BONNEVILLE
159,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JROUTLEY
  • MEMBER
  • 3 POSTS
My car runs rough when accelerated and stalls when slowin down
Feb 3, 2009 at 11:42 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
How long since you had a tune-up? Are there any codes? Can you check fuel pressure?
Feb 4, 2009 at 8:04 AM
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JROUTLEY
  • MEMBER
  • 3 POSTS
No codes. Just changed fuel filter. Unsure how long on the tune up, just bought the car.
Feb 4, 2009 at 9:03 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Pull the plugs, one at a time, give them the once over.

Run the vehicle in the dark, with the hood raised, If you see electrical fire everywhere, you may need new plug-wires. Check fuel pressure.
Feb 4, 2009 at 11:36 PM
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JROUTLEY
  • MEMBER
  • 3 POSTS
Thank you.
Feb 5, 2009 at 1:34 AM
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