2000 Pontiac Sunfire bucking trying to maintain a constant

2000 PONTIAC SUNFIRE
10,800 MILES • 4 CYL • 2WD • AUTOMATIC
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BEPETRO
  • MEMBER
  • 2 POSTS
When trying to maintain a constent speed the car bucks not all the time though. When this happens the tack goes up a bit then back down. Replaced fuel filter, had fuel pump checked, plugs, throttle module, distrubutor.

Bill
Oct 2, 2009 at 1:28 AM
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F4I_GUY
  • ✓Experienced Mechanic
  • 3,302 POSTS
Does it feel like the transmission is slipping?
Oct 12, 2009 at 2:34 AM
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BEPETRO
  • MEMBER
  • 2 POSTS
No, when it bucks or lunges the tack goes up alittle then back to normal. It starts and idles fine. Runs good when you jump on it.
Oct 12, 2009 at 3:53 AM
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