 Speedo Cable question....Fixed !, Smooth and steady now.... |
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| jim_hoyland |
 May 8 2024, 12:32 PM
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#1
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Get that VIN ?  Group: Members Posts: 9,303 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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Suddenly last month I got a very erratic speedo needle. I disconnected the gauge end and squirted cable lube into the cable, hooked it back up and started to get less bounce above 30.
It’s better, but I’m curious whether it can be made smoother. Any tip will be appreciated |
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| 914sgofast2 |
May 8 2024, 01:48 PM
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#2
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Senior Member Group: Members Posts: 617 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
You probably have a bend that is too sharp for the cable and conduit, so the cable is getting bound up by a turn that is too sharp for it. These cars are very sensitive to this problem in my experience.
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| jim_hoyland |
May 8 2024, 03:11 PM
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#3
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Get that VIN ? Group: Members Posts: 9,303 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(914sgofast2 @ May 8 2024, 12:48 PM)  You probably have a bend that is too sharp for the cable and conduit, so the cable is getting bound up by a turn that is too sharp for it. These cars are very sensitive to this problem in my experience. Should this be straighter ? Attached thumbnail(s) 
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| 930cabman |
May 8 2024, 04:20 PM
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#4
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Advanced Member Group: Members Posts: 3,067 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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I would think not, is the cable original? could there be a kink under the dash
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| jim_hoyland |
May 8 2024, 04:42 PM
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#5
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Get that VIN ? Group: Members Posts: 9,303 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Going to check the cable behind the gauge tomorrow. Once cruising above 50, the needle is pretty smooth.
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| 914sgofast2 |
May 9 2024, 09:20 AM
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#6
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Senior Member Group: Members Posts: 617 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
On my car its the bend that starts where the speedo cable comes out of the center tunnel and up to the back of the speedometer which seems to be the place where the cable binds up if its not routed "just right."
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| Retroracer |
May 9 2024, 06:33 PM
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#7
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Senior Member Group: Members Posts: 612 Joined: 7-July 13 From: Bend OR Member No.: 16,100 Region Association: Pacific Northwest
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The speedo on my car has always oscillated wildly at 30mph and below. I assumed it was a Porsche feature to encourage the driver to accelerate to a higher speed where a more accurate reading could be established.
- Tony |
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| jim_hoyland |
May 9 2024, 06:45 PM
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#8
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Get that VIN ? Group: Members Posts: 9,303 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Update: Gonzo54 (Ric) came over and we straightened the cable run between the angle dive and the firewall. Then checked behind the Speedo to make sure the curve was smooth and wide.
Both ends were lube with Cable Lube before attaching the ends. The first test drive showed good improvement. Later I made a short trip and the needle became very stable. |
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