Tach Prblems
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Joined: Aug 2007
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From: Keesler AFB, Ms
Car: 1986 Iroc Z-28
Engine: 5.0 305 TPI
Transmission: Auto
Axle/Gears: Stock
Tach Prblems
I have a 91 Camaro RS, when I place the key to Acc. the tach goes from end to end, but never recovers. The tach stays all the way at red line when the car is running. Any suggestions? 
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Joined: Jul 2004
Posts: 2,989
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Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Tach Prblems
It is very likely that the tach driver module is bad. It's the small circuit board inside the instrument cluster, just behind the thachometer. You can replace it with another one or you can try to fix it. Search for a Tachometer Fix in this forum and you'll find a lot of links but one in particular that contains a lot of good advice.
Lou
Lou
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