ROUGH IDLE & POWER LOSS - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-19-2006, 03:07 PM   #11
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Glad you got it fixed...

The coil pack is actually 3 coils in a pack... so its possible for one coil to fail... In this case with all of the unburned fule, the ECM'* correction for seeing this unburned fuel( More Oxygen ) is to throw more fuel into the mix... In the future you may be buying a new Cat...

But glad to hear its running good now

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Old 11-19-2006, 06:27 PM   #12
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Good thing you got it fixed....

Now change that oil...running on 2/3 coil packs is what killed the bearings on my original motor...unburned fuel washed down into the oil, which thinned it.
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Old 11-20-2006, 06:25 PM   #13
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thanks again, i'll do that
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