Back firing - Page 2 - 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 02-13-2007, 11:11 PM   #11
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Take a read through this. I know it'* very long, but it'* informative:

http://www.bonnevilleclub.com/forum/...289&highlight=

I had a VERY similar situation on a 94 Olds. It ended up being the harmonic balancer of all things. All symptoms were the same as yours, and I did all of the same troubleshooting steps...

Check your HB for cracks in the rubber around the rim. Age may have gotten the best of it.
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Old 02-13-2007, 11:24 PM   #12
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Quote:
Originally Posted by BLAZZ
Quote:
Originally Posted by Damemorder
You should really fix the odometer. They're very simple.
plz, do tell
The speedometer works right? Pop the I/P apart and slide in some junkyard gears.
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Old 02-14-2007, 07:43 AM   #13
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Please update your title to something more appropriate like Poor idling or something like that.

The car is actually not backfiring, merely running poorly.
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Old 02-18-2007, 10:22 PM   #14
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well the car was back firing, when runing cold,, fixed,,, after i swiched out plugs and wires it was still runing bad, so i started pushing on the wires to make sure thay where on all the way,, and when i was pushing on the 1st coil it ran good, and when i let go it ran bad,. So i pulled it and swiched it, SAME,, next i cleaned the ICM and put some of that gel,on the ICM and i runs good now,
it seems that the inside on the coil wasnt makeing good contact with the ICM

It still has a stumble at rev up, when i first punch it, but it allwas did that

Sorry if im going off topic, ""has had a small wine at low speeds, but shifts good,""
i know its not good, i just dont know how bad, ive had the car for 4 1/2 years and it always had a wine, never got better or worse

sorry i have many questions just dont want to post tomany topics,
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Old 02-18-2007, 10:25 PM   #15
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Quote:
Originally Posted by Damemorder
Quote:
Originally Posted by BLAZZ
Quote:
Originally Posted by Damemorder
You should really fix the odometer. They're very simple.
plz, do tell
The speedometer works right? Pop the I/P apart and slide in some junkyard gears.
I/P? is that on the side of the tran? and if its a gear, would that wine?? plz say yes
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Old 02-18-2007, 10:28 PM   #16
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Instrument panel. As for you whine, have you checked the power steering fluid?
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Old 02-19-2007, 01:24 AM   #17
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Quote:
Originally Posted by Archon
Instrument panel. As for you whine, have you checked the power steering fluid?
No i get that to whiney power steering ,, this whine is from the trany it dos it at low speeds, and gets higher and lower pitch, with the RPM'*
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Old 02-20-2007, 10:31 PM   #18
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That sounds more like a hub assembly to me.
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Old 03-03-2007, 08:49 PM   #19
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Its a trany whine
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Old 03-03-2007, 10:38 PM   #20
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Quote:
..vacuum leak..
Concur. Also, checked the fuel filter lately?
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