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Rough idle

Tiny
CHRIS SENSING
  • MEMBER
  • 2001 PONTIAC GRAND AM
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 118,400 MILES
So I have replaced the TPS sensor IAC thinking it was fuel injectors, but I read your post about putting washers in. Did you put them between the frame and mount?
Monday, January 14th, 2019 AT 3:46 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Have you replaced the spark plugs? Rough running is most commonly caused by worn ignition parts.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Compression test would be next to be sure there is no internal engine damage.

https://www.2carpros.com/articles/how-to-test-engine-compression

Check for any vacuum leaks, broken or disconnected hoses as well.

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

Is the check engine light on?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Roy
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Monday, January 14th, 2019 AT 3:55 AM

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