 Tach needle that jumps...sometimes...? |
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| 1972914 |
 Aug 31 2010, 03:00 PM
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#1
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Newbie  Group: Members Posts: 2 Joined: 25-July 10 From: Ohio Member No.: 11,975 Region Association: None  |
Ok, so I am new to 914 ownership, but not to Porsche ownership. I seem to have discovered an interesting issue. The tach needle sometimes just starts "bouncing". Does not seem to be related to any other maneuvers - braking, lights, etc...
Any thoughts? |
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| Sleepin |
Aug 31 2010, 03:05 PM
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#2
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Advanced Member Group: Members Posts: 3,647 Joined: 20-November 07 From: Grand Junction, Co. Member No.: 8,357 Region Association: Rocky Mountains |
Loose or dirty connection on the coil. Or loose or dity connection on the back of the gauge.
Oh, and (IMG:style_emoticons/default/welcome.png) |
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| dr914@autoatlanta.com |
Aug 31 2010, 03:16 PM
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#3
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914 Guru Group: Members Posts: 7,896 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
Dirty points or bad tach ballest. Replace the points and condenser, reset the dwell and the timing. If the needle still bounces, replace the tach with a nice rebuilt one
QUOTE(1972914 @ Aug 31 2010, 02:00 PM)  Ok, so I am new to 914 ownership, but not to Porsche ownership. I seem to have discovered an interesting issue. The tach needle sometimes just starts "bouncing". Does not seem to be related to any other maneuvers - braking, lights, etc... Any thoughts? |
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| SirAndy |
Aug 31 2010, 04:02 PM
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#4
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Resident German Group: Admin Posts: 41,679 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Also check the bottom of the relay board for cracks. The pass-through rivets can brake lose from the solder and create all kinds of intermittent electrical issues, including a bouncing tach ...
(IMG:style_emoticons/default/bye1.gif) Andy |
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| 1972914 |
Aug 31 2010, 04:41 PM
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#5
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Newbie Group: Members Posts: 2 Joined: 25-July 10 From: Ohio Member No.: 11,975 Region Association: None |
Thanks guys
I'll check it out. Rob |
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