pontiac runs choppy, very choppy :-(

1997 PONTIAC GRAND PRIX
156,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BETHANN B
  • MEMBER
  • 1 POST
took her out on Sunday, she ran fine. parked her in the driveway, it rained like heck. took her to the grocery store yesterday, stalled 4 times, the store is less than 10 minutes away. the check engine light was on, the check battery light was on, ran like she lost a cyclinder or a wire was loose and the fuel smelt horrible. is it possible that a worn serpentine belt could cause this?
97 pontiac grand prix se.
thanks
beth
May 25, 2011 at 9:20 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
If the cel is on, have the trouble codes, checked. Some of the national brand autostores used to check codes for free. How long since a tune-up?

Do a cylinder balance test, see if you have a dead cylinder then check fuel--spark-- compression. You kill the cylinders, one at a time, while you note the rpms. If no effect on rpms, the cylinder is dead.
May 25, 2011 at 1:58 PM
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