Overheating...Da hell???? - Page 2 - 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 09-08-2003, 06:02 PM   #11
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I'm pretty sure they are. I can sure hear them kick on. I haven't physically watched it, though. I'll check.
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Old 09-08-2003, 06:11 PM   #12
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by fuddyduddy121
Will, do you have an adequate freon charge?
Yup. AC works great, and the Actron sez things are cool. No pun intended. Where'* your question leading?
The freon pressure in the system must be high enough to activate the radiator fans. So when you use "AUTO" mode, you must also have adequate freon in the system before the fans will start. Just wondering why you still hit 220 with the high speed fans.
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Old 09-08-2003, 06:18 PM   #13
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So, if I leave my AC off, then it won't activate the cooling fans?? This time of year, I rarely use it as it has been in the 70'* in the evenings.
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Old 09-08-2003, 06:21 PM   #14
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Fuddy, my fans work correctly in all modes, and I can still hit 220 after a period of idling. 80-100 outside temps make it alot easier.
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Old 09-08-2003, 06:21 PM   #15
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The computer automatically turns on the low and high speed fans at two preset temperatures, but you can't override that with the A/C if you don't have an adequate freon charge.
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Old 09-08-2003, 06:21 PM   #16
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Turning the A/C on is just a way of checking the cooling fans.... because they run most of the time when the A/C is used.

They're also activated if the PCM reads a temperature higer than 220 or so. Perhaps the PCM is getting a bad temperature reading, that'* one thing that could explain your problem.
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Old 09-09-2003, 02:43 AM   #17
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how do you tell wehre 180 is on the guage...on the highway im a little bit below 200 but i cant tell how much....?
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Old 09-09-2003, 12:27 PM   #18
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When you are at 220 is your primary cooling fan on?? My brothers 89 was doing the exact same thing because of his cooling fan relay was busted. This could be the culprit.
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Old 09-09-2003, 02:18 PM   #19
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Have you got a service manual? The best way to accurately get the temperature is to use a scan tool or display it with the climate control head.
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Old 09-12-2003, 10:04 AM   #20
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Okay, it was 57 degrees out this morning and on my way to work, a total of about 4-5 miles, all 35-45 miles per hour, it got just over 200 and held. Does that sound right? (BTW, that supercharger LOVES cool air!!)(And, no, I didn't keep putting my foot in it)
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