95 bonne needing some TLC and UIM - 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 09-08-2006, 02:38 PM   #1
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Default 95 bonne needing some TLC and UIM

I have posted another thread but still need some answers..what I have is a 95 not supercharged w/160,000 miles on her. I don't know if it ever had a plenum replacement??. I am loosing water but not enough to see on the dip stick or any discoloration of the oil...thats the obvious problem I need to address. do I need to replace the lower gaskets as well??..the original problem that
I have is a really rough idle ..now this does not happen in the morning when it is cool not even all the time when it is hot. When it does idle rough it'* really rough like its hitting on 2 cyliders..I mean ROUGH..I changed the ICM w/ coil packs new wires and plugs. It doesn't seem to have any vacuum leaks...it runs fine @ higher rpm'* with an occasional miss w/check engine light on..... I am stumped...All I have is an odb2 tester for the engine codes...I have tried to have it tested @ a shop unable to communicate was the error message...I'm not a rich man need to do this cheap....little help
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Old 09-08-2006, 02:46 PM   #2
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Well, I missed your other post, but I'm sure we can help you out. Since you mentioned that "all" you had was an OBD2 reader, you may already know that what you need is something like an Actron CP9145 with the OBD2 cable adaptor. Your '95 is the wierd year that has OBD1 codes and software, but an OBD2 connector.

You need to consider replacing both the UIM and the LIM gaskets ASAP. There'* tons of info on here, but start by reading this whole TECHINFO Article 38

BTW, where do you live? There may be a member close by with a code reader that will work.
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Old 09-08-2006, 03:00 PM   #3
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I live in Lttle Rock Arkansas, and by the way you did respond to my last post asking me several questions about my car and flud levels and such...my car is hurtin'
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Old 09-08-2006, 03:32 PM   #4
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Can you remove all six spark plugs & report back with their condition? Keep track of which cylinder each plug comes from.
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Old 09-08-2006, 04:06 PM   #5
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I have read and printed out the article on uim'* you refered to. I just don't have the torque sequence...I'm really not gonna have alot of time to check replies here I'm having to work 10 hour days 6 days a week will try some evening troubleshooting and on Sunday if you guys will bear with me and give me some pointers...thanks
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Old 09-08-2006, 04:08 PM   #6
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And by the way I'm not driving the car during this ordeal so not to do any damage from a complete manifold failure
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Old 09-08-2006, 04:26 PM   #7
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Where are you located?

And let us know when you are ready

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