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Tacho Works Intermittently . Where Should I Start Looking? 200

posted by  Hibbo on  Sun Feb 16 16:23 CST 2003
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last visit: Wed Jan 30 18:28 CST 2013
[RELATED]

Getting my wife's '88 240 ready to sell and in process of correcting problems.

The tacho can't make up its mind and works sporadically ie for part of every trip.

Thankyou in advance for all suggestions.

Take care,
John H from Downunder








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Tacho Works Intermittently . Where Should I Start Looking? 200

posted by  benglar on  Mon Feb 17 19:05 CST 2003
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last visit: Mon Jul 5 09:23 CST 2010
[RELATED]

Does the car have the dreaded mid-'80s insulation rot? Perhaps inside the wiring bundles? An intermittent short on that wire might give the same symptoms.

The tach wire runs directly from the coil lug to the tach. If all else fails, just run a new wire. If you wanna be polite, it should be red with a white stripe.
--
-- Bruce / '82 244 (315k miles!), '86 745, '87 760Ti, '94 854








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Tacho Works Intermittently . Where Should I Start Looking? 200

posted by  Hibbo on  Mon Feb 17 21:47 CST 2003
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last visit: Wed Jan 30 18:28 CST 2013
[RELATED]

Thanks Bruce. Car doesn't have harness rot. Taking Dick's advice I cleaned the coil connection. Tacho seemed to work. Tomorrow's drive will be the test.

John H from Downunder








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Tacho Works Intermittently . Where Should I Start Looking? 200

posted by  dick on  Mon Feb 17 02:57 CST 2003
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last visit: Sun Aug 3 15:24 CST 2014
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Check the spade that attataches to the coil. See if it is clean and tight. May also see if the wire is good at that end.

dick








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Tacho Works Intermittently . Where Should I Start Looking? 200

posted by  Hibbo on  Mon Feb 17 09:31 CST 2003
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last visit: Wed Jan 30 18:28 CST 2013
[RELATED]

Thanks Dick will do so.

John H from Downunder







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