engine spits and sputters under acceleration

2002 PONTIAC GRAND PRIX
104,000 MILES • 6 CYL • 2WD • AUTOMATIC
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ARSNSQD20
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my 02 grand prix gt spits and sputters under acceleration. i have just changed the plugs, wires and coil packs. my service engine light is not on
Jan 1, 2011 at 12:47 AM
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FIXITMR
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so it runs good when NOT accelerating and while idling?
Jan 5, 2011 at 8:18 AM
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ARSNSQD20
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yes the car idles fine and revs good in park only does it during acceleration. i did also replace the fuel filter. could it be the maf, fuel pump or the catalytic converter.
Jan 5, 2011 at 8:38 PM
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FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
you should have codes read anyway to see if anything shows. fuel pressure test would help too. check the MAF for dirtiness. clean if necessary. maybe also test TPS.
Jan 6, 2011 at 12:56 AM