95 j30 tach fluctuating and sticks

[houndog1]

Hey you all, New to Nico.I'm sure this topic has been covered in the past so maybe someone could guide me the past post and suggestions.Topic: Tachometer 1995 J30, fluctuating and sticking. I am a mechanic but not familiar with the J30. I do know the shop manual states that the tach is a 2 wire system involving pins 27&20 to the ECU ,BUT WHAT IS THE FIX IF AT ALL THERE IS ONE ? Thank's Guy's Tom

[yodawill2000]

Is the engine revving up and down with the tach??If not it seems to be a wiring issue.If its literally sticking I would think the tach mech is gummed up.Oh and

Welcome to NICO !!!We will get ya fixed up !!

[houndog1]

Yodi, It sometimes revs up and down, and then sticks in the last place it rest, it's not working properly. I can do the fix if someone will give me an idea if there is one. thank you

[driverdriver]

First step is to remove the entire cluster, clean connections and plug in. See if that fixes it.

Instrument cluster replacement is an age related common issue in these cars.

[houndog1]

Thanks for the input it looks lik I maybe looking, for another cluster

[yodawill2000]

As Driver mentioned cleaning ALL the cluster contacts is step one.And a free one at that !!!

You will soon learn this whole car is computer controlled.One loose connector/ground will wreak havoc.