1999 OLDS ALERO 3.4 STARTS AND IDELS FINE , PUT IN GEAR AND EXCELARTE IT MISFIRES......

  • Tiny
  • omarvaughn
  • 1999 Oldsmobile Alero
  • 170 miles

1999 olds alero 3.4 starts and idles fine, put in gear and excellarte it misfires. If u push the gas to the floor it will slow down but when you let off it will pick up speed. When it quits you have to let it sel for about an hour and it might start back up, if so it will miss and shake then it will smooth out but you cant give it gas if u do it will backfire.

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Sunday, October 23rd, 2011 AT 8:20 PM

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  • Tiny
  • Wrenchtech
  • Expert
  • 20,046 posts

What's the mileage? What ignition components have been changed and when. Have the codes read and post the code numbers here.

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Tuesday, October 25th, 2011 AT 11:36 PM

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