Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Need Help...tach problem.

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Old Jun 22, 2005 | 10:03 PM
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Question Need Help...tach problem.

Hey guys,

I just bought a 1990 RS with a TBI 305. My problem is the tach is way off. It reads 4000 rpm when the motor is at 2000. It's real bad. I thought maybe it was originally a 6 cylinder car, but the vin states it is an 8, and the stickers under the hood all say 5.0 liter. Is it the wrong cluster? Any ideas?

Thanks!

Randy
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