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Registered
Join Date: Sep 2007
Location: Connecticut
Posts: 438
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Another Speedometer Problem
The speedometer in my 87 911 was staying at zero until the car got to about 30 mph, at which point it would spring to life and work properly. The odometer would continue to turn over, even when the speed was not registering.
I did a search on the forum and found this: Quote:
Is there something else I should be looking at, or is the solution "Send it to North Hollywood Speedometer"?
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1987 911 Coupe, Diamond Blue Metallic 2006 Cayman S, Seal Gray 1983 911 Targa, Black: The Dirty 911 (GRM) |
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09-02-2009, 08:29 AM
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Join Date: May 2006
Posts: 77
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I'm going with North Hollywood.
If you do it send accurate tire circumference information and they'll calibrate your speedometer so you'll have also have one of the few Porsches in the country with an accurate speedometer. |
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09-02-2009, 11:44 AM
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Registered
Join Date: Sep 2007
Location: Connecticut
Posts: 438
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A longer test ride reveals that the speedometer now has no real relationship with actual speed. Previously, it was accurate above 30 mph. Now, it always reads between 20 and 40, regardless of how fast I'm going. As a bonus, the needle now bounces around a lot.
It appears that I have wasted $75 and a few hours work. I will be reinstalling the original sender and sending out the speedometer unless someone suggests otherwise. Oh, and tires are original size.
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1987 911 Coupe, Diamond Blue Metallic 2006 Cayman S, Seal Gray 1983 911 Targa, Black: The Dirty 911 (GRM) |
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09-02-2009, 12:27 PM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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voltage regulator or bad ground maybe? or even running alternate wires for testing purposes from the sender.
keep us posted
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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09-02-2009, 01:35 PM
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Hi,
I have a long shot for you, My tach won't register after the car has been sitting in the hot sun, then all of a sudden it shoots up to where it should be and works fine. When I talked with Hollywood about another gauge problem, I also asked about the tach. They said that sometimes the plastic gauge lens can touch the needle and cause issues. maybe this is happening to your speedo. Rutager
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Rutager West 1977 911S Targa Chocolate Brown |
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09-02-2009, 01:46 PM
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Registered
Join Date: Sep 2007
Location: Connecticut
Posts: 438
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The car is garaged, so it's not the hot sun. Grounds have recently been cleaned.
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1987 911 Coupe, Diamond Blue Metallic 2006 Cayman S, Seal Gray 1983 911 Targa, Black: The Dirty 911 (GRM) |
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09-02-2009, 02:15 PM
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1977 Porsche 911S Targa
