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Tach stopped working


wvumtnbkr
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Hello!

 

The longacre stepper motor tach in my racecar stopped showing the rpm.

 

The ecu and engine are 1997 Chevy venture.

 

The tach worked for 2 years.  The tach still lights up and does all it's normal things, except the needle doesn't move when the engine is running.

 

No blown fuses.  No changes to the wiring.  No codes show up.

 

I thought it could be a crank sensor issue, but the scanner pics up rhe rpm just fine when hooked to the obd port.

 

The tach does require (and has) a pull up resistor wired in.

 

Any help is appreciated!

 

P.s. maybe not related...  the car is running rich as he'll on initial startup.

Edited by wvumtnbkr
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