Tachometer acting up?

Whitezmbie · #1 (**permalink**) 05-17-2008, 09:41 PM

The tach on my 95 stroke is acting up. When I start the truck it will shoot to 1500 rpm and stay there soemtimes the whole time I drive around. Occasionaly it will drop the the actual rpm and rise and fall as I drive correctly bet them sometimes it will jump right back to around 1500 or 1600 and stay there. Is the tach going bad or fault wireing??? I know it is idleing fine but it bugs me that i cant always see my correct rpms. Thanks

Cuda_jim · #2 (**permalink**) 05-18-2008, 01:25 PM

Could be the tach or the wiring. Pretty simple gage, It gets it's signal right from the PCM. The PCM get it's info from the CPS. A good scanner will tell if the signal is good coming from the PCM. If the engine is running OK the CPS is not your trouble.

My WAG is a bad tach.

Remove and re-seat the 2 large connectors on the back of the instrument cluster.
The 14 pin black connector is the one you want to look at.