Running rough

1992 PONTIAC FIREBIRD
130,000 MILES • 3.1L • 6 CYL • 2WD • MANUAL
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TONI PERRY
  • MEMBER
  • 1 POST
It is running really rough like it's misfiring.
Jan 22, 2020 at 2:02 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
Is the check engine light on or flashing? If there are no codes then we need to check for vacuum leaks.

Does it only run rough when idling or at other times? Have you performed any repairs to this point?

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

https://www.2carpros.com/articles/engine-misfires-or-runs-rough
Jan 22, 2020 at 6:27 PM
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