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Rpm gauge play? 700 1991

There seems to be some gauge play with the rpm reader at idle, it shows that the engine is running at 500rpm (below normal). Theres little to no feeling when in idle from any other time, but small shutterings here and there.

Rpm gauge has also been seen darting wildly from time to time, and then go back to normal.

What is this?








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    Rpm gauge play? 700 1991

    My 940 was doing similar things. I got a "new" tach from an eBay seller, installed this, and the problem is gone.
    --
    Bob (son's 81-244GL B21F/M46, dtr's 83-244DL B23F/M46, my 94-944 B230FD; hobbycar 77 MGB, and a few old motorcycles)








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    Rpm gauge play? 700 1991

    Sounds like there's a problem with your instrument gauge unit. Probably best to try to get the whole assembly from a pick-your-part car.







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