Misfire on acceleration (95SE) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-20-2005, 01:35 PM   #1
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Default Misfire on acceleration (95SE)

I have a 95 SE non sc.
Recently I have noticed a misfire on acceleration. It seems to feel a little "choppy" and flat from a stoplight with moderate pedal or heavy pedal. FWIW, I have a new fuel pump and filters, tune-up is about a year old. I also dont think its bad gas.
Could this be an ignition issue?? Possibly coils??

Thanks in advance for your help!!!!!!!!!!!!!!
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Old 02-20-2005, 01:39 PM   #2
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how old are your plugs?
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Old 02-20-2005, 04:08 PM   #3
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Plugs were replaced with the tune-up. 15000 miles ago....
Havent checked them, though.

Anyone had a problem with coils??? What were the symptoms???
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Old 02-20-2005, 04:29 PM   #4
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Most of the time the coils either work or they don't. Much like a fuel pump.

I'd be willing to bet that the issue is in one of your plug wires. Check the resistance of each plug wire. If it'* out of the specs (as detailed in a Chilton'*) then replace the faulty wire. Or, to make things simple, replace them all.

Are you getting a check engine light? If so, scan the codes.
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Old 02-20-2005, 05:07 PM   #5
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Yes, I agree with Vital. Check your plugs. Sounds like a faulty wire of coil pack.
For wires I might suggest getting some very nice Belden Premium wires from your local NAPA. Also for the 8mm wires you will want to request them for a 1994 Bonneville with the Series I because if you request for a 1995 Series II you will get smaller 7MM wires and they'll be an extra couple dollars. The 1994 Series I wires will work just fine and are about 1 inch shorter than the Series II wires which I found are about 5 inches too long on the rear bank wires.
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Old 02-24-2005, 01:16 AM   #6
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#3 Plug wire was the culprit!!!!!!!!!!!!!!!!

Thanks everyone!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 02-24-2005, 01:26 AM   #7
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Any time, Bob. 90 percent of the time, it'* a plug or wire. Glad you got her!
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