Tach reading high

[951le]

Does anyone know what causes a stock tach to read high?

 

[pacecarta]

old age ,

if you must have the tach and the boost accurate send them to john casper
casperselectronics.com
they are both in the same module and can will be repaired together
https://www.casperselectronics.com/...Product_Code=103070&Category_Code=8687GN_Perf

 

[951le]

The boost guage seems to be reading accurate but the tach is reading about 3000 rpm at idle and its not idling nowhere near that.Just thought someone might have an easy fix

 

[pacecarta]

john is the easy fix

https://www.casperselectronics.com/...Product_Code=103070&Category_Code=8687GN_Perf

 

[951le]

Ok thanks for the tip but maybe instead of easy fix I should've said free fix

 

[Bob Avellar]

I'd also like this info. Maybe poor connection someplace. Mine always seemed to read at least in the ballpark but after redoing all the harness and dash removal during the restoration now the boost and tach always read much higher than before. It;s about the only major glitch I've run into with this project. Blowing the motor on the dyno doesn't really count.