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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  • 2 POSTS
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
Dec 31, 2010 at 4:47 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,990 POSTS
so it runs good when NOT accelerating and while idling?
Jan 5, 2011 at 12:18 AM
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ARSNSQD20
  • MEMBER
  • 2 POSTS
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 12:38 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 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 5, 2011 at 4:56 PM
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