couple of problems - 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 09-26-2005, 12:50 PM   #1
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Default couple of problems

I have the following codes back from the diagnostic I got when I took my car in to the trany shop.
99
69 a/c head pressure switch circuit
56Quad Driver "B" fault
55exhaust gas recirculation fault (egr solenoid #3)
38tcc brake input circuit
36 transaxle shift control problem

Before I take it to the auto electric service place, can I fix any of these things on my own. If so I need some step by step instructions.
Can anyone help
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Old 09-26-2005, 02:15 PM   #2
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More will chime in soon. The egr you can possilbly fix by cleaning and lightly oiling. I believe the procedure is in techinfo under EGR.

The AC problem .. I'm unfamiliar. However it'* possible you only have an AC and EGR problems that are causing the other codes.
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Old 09-26-2005, 02:24 PM   #3
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It'* not under egr
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Old 09-26-2005, 02:29 PM   #4
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Someone with that style will reply soon.

Looks like you use a small brush to clean and then lightly oil..
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Old 09-26-2005, 05:50 PM   #5
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Default Re: couple of problems

Quote:
Originally Posted by alleywaydon
I have the following codes back from the diagnostic I got when I took my car in to the trany shop.
99
69 a/c head pressure switch circuit
56Quad Driver "B" fault
55exhaust gas recirculation fault (egr solenoid #3)
38tcc brake input circuit
36 transaxle shift control problem

Before I take it to the auto electric service place, can I fix any of these things on my own. If so I need some step by step instructions.
Can anyone help
In a nutshell, if those codes are accurate and reliable, your AC is shot (no pressure), your car lacks power due to a faulty EGR, and your trans has more than one problem.

Solution:
Have the AC system repaired and recharged.
Clean your EGR valve with carb cleaner and a brush, let it evaporate, and then lightly oil the springs and shafts.
Get your trans diagnosed properly and rebuilt.

It would help if you would tell us your symptoms as you observe them. Some of these codes may or may not be current or even correct.

You might want to START by clearing the codes. Disconnect your battery for about a half hour, then drive for a day or two, and pull new codes using the trick listed in Techinfo. Let us know what current codes you have at that time.

http://www.bonnevilleclub.com/techinfo/?article=34
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Old 09-26-2005, 07:44 PM   #6
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the only problems I have noticed are:
1)check engine light coming on when I slow down and then goes off when I speed up or stop
2) at about 40-44mph sounds like something is rubbing momentarily
3)After the car is off for a while, when I turn it on it starts then sputters and goes off unless I hit the gas.
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Old 09-26-2005, 07:53 PM   #7
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1 definatly sounds like a non-functioning or really sticky EGR. If you unplug it, the SES light will act the same way.
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Old 09-27-2005, 08:03 PM   #8
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Was I supposed to remove the whole egr valve to clean it or just spray the carb cleaner on it while it is still connected?
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Old 09-27-2005, 09:12 PM   #9
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Old 09-27-2005, 10:15 PM   #10
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Am I supposed to replace the gasket also, or can I just leave the old one on there??
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