Bad coil pack that isnt bad..... - 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 04-09-2011, 10:37 PM   #1
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Exclamation Bad coil pack that isnt bad.....

Hello,

I am currently trying to fix a idle/rough running problem in a 1995 olds 88 royale ls.
The problem is that the middle coil pack is producing a very weak spark. no problem right. Went to my bonne, and removed a 2 month old coil pack, and switched it over. The problem is still the same. My brand new coil pack produces the same weak spark as the old one did.
Where do i look next?
All other coils fire a nice spark, but the middle one barely lights the tester bulb.
We are working on it now, and my phone will buzz if there is a reply, so please, toss out whatever ideas you may have.

Thanks in advance. You guys rock!
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Old 04-09-2011, 10:40 PM   #2
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Check the terminals on the ICM Is there any corrosion? If the problem is there with different coils, and the terminals look good, then the ICM might be bad.
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Old 04-09-2011, 10:46 PM   #3
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I'm headed to the driveway now. I am going to yank the whole coil assembly off my bonne and throw it into the olds. If it works, I guess I found my issue, and if not, well %$*#! lol

I'm trying to fix this to drive while I fix tranny/suspension problems on the bonne :(.
work work work.

Thx Dan
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Old 04-09-2011, 11:09 PM   #4
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Yea it was the plate under the coils. I put my bonne one in there and it runs like brand new. Now I just have to get my hands on a new one? Any ideas what a guy would expect to pay locally for the part? I will call around and get new/used prices tomorrow.
Any reason not to buy one from a wrecker?

Thanks again Dan. I wouldn't have bothers to rip into both cars without your advice lol.
Now to go put it back together.
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Old 04-09-2011, 11:18 PM   #5
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I buy them at the wrecker with ICM and all three coils for 50 + tax. CAD money.good luck!
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Old 04-11-2011, 08:24 AM   #6
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Definately a JY. New these are ~100
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Old 04-11-2011, 12:45 PM   #7
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We called parts places, and they wanted 190$ for a new one.
So I went to the wreckers and bought two for 20$ lol.My Olds works like a charm now. I will be swapping plates tomorrow . Thx for the help guys!
I also found a treasure. A 1995 bonne just like mine except burgundy. It was untouched, and they only want 400$ for the whole car.
A quick off topic question. How hard is it to pull the entire front axle, and then replace it with another. I had seen it done on a different car i once owned, and it looked like a handful of bolts, and the whole thing popped out. I'm parking my bonne as it needs a new tranny (no 1st gear), and it has some shudders and clunks in the front passenger wheel.
I'm hoping to buy this new ride, harvest it for parts, swap the tranny, and possibly the axles.

Any advice would be awesome!!
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