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Failed Tachometer and Strange Noises 700 1990

posted by  Steve on  Sun Jan 2 15:53 CST 2005
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last visit: Fri Oct 24 07:16 CST 2014
[RELATED]

My own 740 has a dead tach which I am about to replace. Suggest you get one from a boneyard. I also suspect it is unrelated to the noise.

The loud noise: is it related to engine speed or driveshaft speed? Heard when idling or only when driving? I doubt the speed sensor is touching anything: it would quickly self-destruct and the engine would stop. Try using a mechanic's stethoscope to pinpoint the noise.






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