1997 Buick Century engine shakes

1997 BUICK CENTURY
230,000 MILES • 6 CYL • FWD • AUTOMATIC
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PACHANGAH
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  • 1 POST
1997 Buick century with 3.1 lt. v6, when the engine starts it shacks and will not take throttle.
There are 2 electrical plugs on the right side of the coils. A large one and a smaller one. If I pull out the large plug, engine levels out and seems fine. I put plug back and engine ok. If I shut off, and restart engine shakes again.
Apr 28, 2009 at 5:59 AM
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BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
Check if you have spark on all cylinders
suspect module and or coil if not
Apr 28, 2009 at 6:05 AM
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