Ughh.... engine troubles. - 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 09-01-2007, 06:01 PM   #1
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Default Ughh.... engine troubles.

Alright... I was driving my bonne today, taking it easy, just going to the store. When I was pulling out of the store, I gave it about 1/4 throttle to get up to speed with traffic. And let me tell you what... it was skipping, spitting, sputtering and shaking... did not want to go. Anything over 1/4 throttle, actually less than that, and the car shakes sputters and spits. What could possibly going wrong here? I know the (I believe) gasket between the LIM and the supercharger is leaking... but the car also has 213K miles on it.
Previous things I have noticed is pulsing RPM'* at idle on occasion. Like if I start my car up, the rpm'* will go up to 1,500, then down to 800 and stay around there... but besides that it has been running like a champ. I don't know these 3800'* very well, coming from a Ford backround... but any ideas would be helpful.
Thanks.
-Casey
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Old 09-01-2007, 06:08 PM   #2
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Have you done a tune-up on it recently? There'* a lot of things that could cause that problem, but if it'* been a while since a tune-up there'* a good chance it'* in need of that.

Wait for one of the gearheads to chime in here, I'm sure they can help you more than I can, but I'd also suggest cleaning your intake and MAF sensor, and Sea-Foaming the heck out of her. I did that last night (on top of running Marvel Mystery Oil in my gas) and the rough idle and hiccuping it used to do has ceased.

Where'* Boosty when you need him?
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Old 09-01-2007, 06:39 PM   #3
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It could be a fuel supply issue. I had a similar thing happening a while back. My fuel pump got weaker and weaker as it got warmer. Get your fuel pressure tested. Make sure to pull the vacuum line off the fuel pressure regulator to get full pressure.

Or if it only happens on turns, it could be the original fuel strainer not getting fuel.

I'll move this to 92-99 for proper attention.
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Old 09-02-2007, 01:18 AM   #4
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Waiting for Boosty.
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Old 09-02-2007, 10:12 AM   #5
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Quote:
Originally Posted by Archon
Waiting for Boosty.
Acorn, I mean Archon off duty today?

Sounds like a fuel issue to me. I recently had to replace my pump/pickup
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Old 09-02-2007, 11:40 AM   #6
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No, squirrelly. He'* already got good information from John on a good place to start...so add....
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Old 09-02-2007, 05:11 PM   #7
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Any more ideas?
After cleaning the TB(still on car) the car will now not ever start.
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Old 09-02-2007, 05:14 PM   #8
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if you cleaned the TB on the car, you cleaned the wrong end of it. You need to take it off to have it properly cleaned.

Get that fuel pressure checked before doing anything else.
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Old 09-02-2007, 05:15 PM   #9
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Any SES light? If so, check Techinfo (Up at the top of the page) under Electrical --> Computer --> 92/93 L67 codes, read it and see if you have any codes. As of now, it could be anything.

EDIT - I noticed that you cleaned the TB while it was on the car. That'* a big no-no. If you didn't remove any of the sensors, you could have fried one or maybe all of them.
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Old 09-02-2007, 06:20 PM   #10
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We need to determine if it'* a fuel or spark problem. Check for spark at each of the 3 front cylinders & see if you have any fuel at the schrader valve.
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