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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 06-17-2005, 12:08 AM   #11
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That symptom could be caused by a sticking thermostat. When it sticks closed, it gets hot; when it opens normally, temps are controlled OK.
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Old 06-17-2005, 02:50 AM   #12
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I found that when I first got my car the relays for both fans and a/c were not working due to corroded connections. Your fans might not be kickin on when your a/c kicks on. Pop the hood, kick on the ac and check the fans for operation. Cheap easy and free test.
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Old 06-17-2005, 06:49 AM   #13
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Do the 92-99'* have multi speed cooling fans, fast & slow? Maybe a fast speed relay or series/parallel relay is malfunctioning. I think they are interlocked with a/c controls to run in fast speed when a/c selected to on.
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Old 06-17-2005, 09:12 AM   #14
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Quote:
Originally Posted by markwb
Do the 92-99'* have multi speed cooling fans, fast & slow? Maybe a fast speed relay or series/parallel relay is malfunctioning. I think they are interlocked with a/c controls to run in fast speed when a/c selected to on.
There are 2 fans, and a hi and lo speed relay. They come on High speed with the AC, but aren't directly interlocked to the A/C circuit. It'* the PCM that commands hi-speed fans if it sees the A/C request data line bit go high.
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Old 06-17-2005, 11:37 PM   #15
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Quote:
Originally Posted by BillBost37
I found that when I first got my car the relays for both fans and a/c were not working due to corroded connections. Your fans might not be kickin on when your a/c kicks on. Pop the hood, kick on the ac and check the fans for operation. Cheap easy and free test.
that'* one of the first things i checked...the fans do run with the a/c on....but since i haven't got that hot...i guess the old tstat was sticking....i brought a 180 tstat & new gasket today. So i'll get that put on, a lil' flush, and then we'll how cool that keeps things
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