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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 06-01-2007, 02:09 PM   #1
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Default 2 problems

the check engine soon light is on

1. the car will... so to speak will rev its self up... i can be just turning the car on, coasting down the road, or even sitting at a stop sign/light and car will on the occasion rev up to ne where between 1.5k and 3.5k rpms

2. at ne given time the car will shut off. no hints that it is going to happen or anything. oil pressure gauge drops and then dinger goes off saying check gauges then as soon as the ding comes in power steering goes out... (given considering car is shut off) but its wierd how the power steering doesnt go out till oil pressure has dropped.
usually if i am going down the road at a decent speed i can put it in nuetral and start it back up. but sometimes i cant do that it will only work if a come to a stop and put it in park and turn it back on that way


i just bought a new battery and cables about 3 months ago (i checked around on here to see if someone else had problem and all i could find was check cables)
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Old 06-01-2007, 02:11 PM   #2
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When you mean the car "shuts off", does it bog down and stall, or does it shut off like when the key is turned off? From number 1 and 2, it sounds like a failing/erratic IAC.
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Old 06-01-2007, 02:14 PM   #3
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shuts off like the key has been turned off
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Old 06-01-2007, 02:22 PM   #4
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You probably don't have two problems.

Pull those codes and post them up. We'll have an idea how to help you with that information.
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Old 06-01-2007, 02:23 PM   #5
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pull those codes?
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Old 06-01-2007, 02:26 PM   #6
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Yes..Head over to Advance Auto or whatever part of the Parts America chain you have there and have them pull the check engine codes that are stored in the PCM.

Without that information.. we may waste your time and money hoping to stumble across the actual cause of the problem.
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Old 06-01-2007, 02:28 PM   #7
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oh really? that sucks cause i already tried that and it said something along the lines of...... "system reading error"
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Old 06-01-2007, 02:29 PM   #8
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Oh wait, you have a '94. You need to go to a dealer, or find someone with a scanner that is able to read 94/95 PCMs.
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Old 06-01-2007, 02:30 PM   #9
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Ok..that place has a scanner for OBD2, meanwhile..your car is the elusive OBD1.5 hybrid.

Well...meanwhile..
Check for vacuum leaks, battery cable corrosion and perform a throttle body cleaning..
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Old 06-01-2007, 02:31 PM   #10
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are the plugs to pcm different? cause they had a thing at autozone that could plug into it and the guy would hit read and then it would say .... reading..... reading........ reading........ system reading error
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