1991 OLDSMOBILE CUTLASS CIERA JUST HAD TUNEUP & NOW IT'S BACKFIRING. WHAT SHOULD I DO?PLEASE HELP !

1991 OLDSMOBILE CIERA
6 CYL • FWD
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Had a tune-up & oil change a couple of days ago and now when i step on the gasthe car runs rough and the car****** and backfires
Dec 21, 2011 at 4:05 AM
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MHPAUTOS
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TAKE IT BACK TO WHOEVER DID THE WORK AND GET THEM TO CHECK IF THEY HAVE PUT THE IGNITION LEADS BACK ON THE CORRECT WAY.
Dec 21, 2011 at 4:45 AM