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
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
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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