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occasionally feel like it skips a beat

2004 PONTIAC GRAND AM
182,000 MILES
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HICKSCHNICK
  • MEMBER
  • 2 POSTS
I have a 2004 pontiac grand am with the 3400v6. when its cold its hard to start and when I drive it down the highway it will occasionally feel like it skips a beat. When it does this the check engine light never comes on and if I lift the throttle then pull up it comes back on.

New tps, thermostat, engine temp sensor and fuel pressure regulator. Ecm not throwing codes when car
Jan 18, 2012 at 6:55 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
how old are the plugs/wires?
Jan 18, 2012 at 7:10 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
have you checked/cleaned MAF?
Jan 18, 2012 at 7:10 PM
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HICKSCHNICK
  • MEMBER
  • 2 POSTS
New plugs. Not new wires but changed them around 100,000 miles. Maf is clean. The screen in front of it is removed. All resistors are still intact.
Jan 18, 2012 at 7:16 PM
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