runs rough back fires

2000 PONTIAC GRAND AM
136,000 MILES • 4 CYL • FWD • AUTOMATIC
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MEANMIKE58
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  • 1 POST
2000 grand am weak spark cylinder 1 & 3
Feb 5, 2011 at 11:14 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
The coils are paired for 1/4 and 2/3 so it's not likely a coil problem. These engines are notorious for bad coil housings. that white housing acts as a distributor cap and quite often cause misfires.
Feb 6, 2011 at 12:30 AM
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