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Registered
Join Date: Jun 2000
Location: Bay Area, California
Posts: 6
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Erratic Temperature Gauge
My oil temp gauge in my 81 911SC has begun emulating its big brother, the tachometer. That is, after the engine warms up to about 210 (I've replace the original gauge with the numbered-face), revving the engine will cause it to shoot up to 250. Back off, and it falls back to 210. Turning on the A/C, lights, etc. bumps it up a little, too. I thought it was a bad voltage regulator, but the volts at the battery are staying between
(depending on revs and load) 12.5-14 V. Has anyone seen this before? A bad gauge? I'm going to swap my old, unnumbered one back in to test it. Any suggestions appreciated. Thanks. Darren Cooke dcooke@att.net 81 911SC 52k mi |
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08-01-2001, 08:44 AM
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Senior Member
Join Date: Jan 2001
Location: Left Coast, Canada
Posts: 4,572
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dcooke,
Check the multi-point ground behind the dash board. As a matter of fact, check every damn ground you can find! ------------------ '81 SC Coupe (aka: "Blue Bomber") Canada West Region PCA The Blue Bomber's Website |
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08-01-2001, 03:49 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,469
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check the ground strap on the trans to the body, too. sounds like a ground problem, considering you have normal voltage.
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08-01-2001, 04:14 PM
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Registered
Join Date: Jun 2000
Location: Bay Area, California
Posts: 6
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I hadn't thought of the transmission ground strap, but that makes sense. I'll check it out (and other ground points) and post what I find. Thanks.
-- Darren |
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08-02-2001, 07:48 AM
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Registered
Join Date: Jun 2000
Location: Bay Area, California
Posts: 6
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It appeared to have been the tranny ground strap after all. I didn't even replace it -- instead I just removed and cleaned up the old one, and the erratic gauge problem is gone. Thanks for the tips.
Darren Cooke |
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08-17-2001, 08:33 AM
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Senior Member
Join Date: Jan 2001
Location: Left Coast, Canada
Posts: 4,572
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You're welcome, Darren.
Now the rest of you...repeat after me: "... It's the grounds.... It's the connections.... It's the grounds....It's the connections..." ------------------ '81 SC Coupe (aka: "Blue Bomber") Canada West Region PCA The Blue Bomber's Website |
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08-17-2001, 08:59 AM
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