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1999 Pontiac Grand Am miss fire

Tiny
JAKETPROCTOR
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 2.4L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 126,000 MILES
Has a miss fire at low rpms when cruising but when it down shifts it runs fine at hi rpms put new plugs in it and it run great for 2 days now it's doing the same thing. Sugestions?
Saturday, December 5th, 2015 AT 8:10 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What motor>>>

were the plugs you removed fouled at all?

Roy
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Sunday, December 6th, 2015 AT 7:45 AM
Tiny
JAKETPROCTOR
  • MEMBER
  • 2 POSTS
Yes they looked bad and I think it has a blown head gasket it's a 2.4 twin cam
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Sunday, December 6th, 2015 AT 4:41 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Start with a compression test

Roy
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Sunday, December 6th, 2015 AT 4:45 PM

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