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View Full Version : Tachometer reads too high

Stan Masta
11-23-2009, 06:54 AM
Anybody knows where the problem lies? GM manual suggests bad ground or open in the DIM circuit.
limey
11-23-2009, 10:12 AM
If it's reading 1000 RPM's higher, that's pretty typical for a 1990 Model, which i presume you own as these are prone to this issue.

Only fix is to replace the Tach in the cluster.
rhipsher
11-30-2009, 10:47 AM
Is it just reading high and idling normal?