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How to fix broken tach?

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Old Sep 24, 2002 | 09:33 PM
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Berlinetta
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From: Rhome, Tx
How to fix broken tach?
At 75 mph my tach reads at 4500 rpms. Thats with the tranny in overdrive and i only have 2.73 gears. Is the tach the problem or is there something else in the circuit causing it to read funky. Thanks
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Old Sep 25, 2002 | 01:53 PM
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From: Rhome, Tx
I know you guys know the answer to this.
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Old Sep 25, 2002 | 07:51 PM
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hook up an aftermarket tachometer and see what you get for readings.

the engine could well be spinning at 4500RPM if you've got a slipping tranny.
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Old Sep 25, 2002 | 09:37 PM
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From: Rhome, Tx
At idle when the gauge tach reads 2600 rpms the engine analyzer i hooked up has the rpms at about 700.
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