Ok, Ok, I Know I've been gone for a while... but HELP - 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 03-14-2006, 12:16 PM   #1
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Default Ok, Ok, I Know I've been gone for a while... but HELP

Ok... So I've been internetless for the better part of a year now (it sucks)..


Heres the deal. I bought a 92 Buick Park Avenue... (L27), 120k on it...

It runs MINT, unless its hot out. Then under acceleration the engine cuts in and out like its losing spark. I checked fuel pressure, it was right where it should be... So the only other thing I can think of is the ICM...

Am i on the right track ? Anything else i Should look for? It'* getting worse, and I need to figure this out before I get stranded somewhere lol..

Any help would be appreciated...

Thanks Guys
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Old 03-14-2006, 12:24 PM   #2
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Default Re: Ok, Ok, I Know I've been gone for a while... but HELP

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Originally Posted by DrCheeto
Ok... So I've been internetless for the better part of a year now (it sucks)..


Heres the deal. I bought a 92 Buick Park Avenue... (L27), 120k on it...

It runs MINT, unless its hot out. Then under acceleration the engine cuts in and out like its losing spark. I checked fuel pressure, it was right where it should be... So the only other thing I can think of is the ICM...

Am i on the right track ? Anything else i Should look for? It'* getting worse, and I need to figure this out before I get stranded somewhere lol..

Any help would be appreciated...

Thanks Guys
Its hard to say, but that is a possibility... Do you have the Magnavox ICM( Plug terminals on both sides of the coil)? or the Delco Type 2 with all of the terminals on one side?

BTW Cheeto, I remember you... Nice to see a returning FL member...We have grown here in FL over the last year..

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Old 03-14-2006, 12:28 PM   #3
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No, Its the Delco Ignition..... It completely cuts out if you accelerate, but if you let off the gas, It comes right back.

ALSO, I forgot to mention , when it starts doing this, If i turn the ignition off and start it back up, It'* fine for a while again...
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Old 03-14-2006, 12:31 PM   #4
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Quote:
Originally Posted by DrCheeto
No, Its the Delco Ignition..... It completely cuts out if you accelerate, but if you let off the gas, It comes right back.

ALSO, I forgot to mention , when it starts doing this, If i turn the ignition off and start it back up, It'* fine for a while again...
Yeah that one is honestly hard to peg... Could be PCM or ICM...

KNow anyone that you could borrow an ICM from?

I had one fail with heat... After a 20 miles drive it would do momentary cut outs... If I floored the h*** out of it, it would again pick up and go... It was freaky... I replaced the ICM and the problems have never returned..

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Old 03-14-2006, 12:35 PM   #5
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I just moved down here, so no, I don't know anyone with an ICM lol...And I really dont want to pop 100 bucks for a new one, So I'm going to hit up some junkyards and see what I can do.
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Old 03-14-2006, 12:36 PM   #6
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you mentioned that you checked the FP...you didnt describe what exaclty you did tho......did you do this while driving??? or at idle in park??? did you disconnect the Vac line too and get a reading??
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Old 03-14-2006, 12:39 PM   #7
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Quote:
Originally Posted by 1993 SLE
you mentioned that you checked the FP...you didnt describe what exaclty you did tho......did you do this while driving??? or at idle in park??? did you disconnect the Vac line too and get a reading??
I was about to mention this. DrCheeto you really want to look at your Fuel pressure, because what you're describing almost sounds like what was happening to me on my 94 SE (L27) when the pump went kaput.
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Old 03-14-2006, 01:46 PM   #8
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Ditto. Check fuel pressure while moving and warmed up. Run a long hose on the gauge to the driver seat and try to recreate the cut-out.
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Old 03-14-2006, 02:02 PM   #9
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Default Re: Ok, Ok, I Know I've been gone for a while... but HELP

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Originally Posted by DrCheeto
I checked fuel pressure, it was right where it should be... So the only other thing I can think of is the ICM... Thanks Guys
If you want to try an ICM PM me.. I'll send one down right away if it'* the problem merely toss a (prearranged amount) at me and we are good. If not..send it back and pay shipping and all is good.
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Old 03-17-2006, 02:24 PM   #10
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Quote:
Originally Posted by Mortehl
Quote:
Originally Posted by 1993 SLE
you mentioned that you checked the FP...you didnt describe what exaclty you did tho......did you do this while driving??? or at idle in park??? did you disconnect the Vac line too and get a reading??
I was about to mention this. DrCheeto you really want to look at your Fuel pressure, because what you're describing almost sounds like what was happening to me on my 94 SE (L27) when the pump went kaput.
Yea, but if it was a fuel pump failing, I dont think cycling ignition would cure it.... Maybe I should check again though.
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