Question about 1986 Pontiac Fiero

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1987 tachometer trouble

I HAVE A 1987 FIERO V6 WITH AUTOMATIC. ENGINE RUNS GREAT. I HAVE A TACHOMETER THAT WHEN YOU TURN KEY TO IGNITION TO ON THE TAC READS 650 RPMS; WEH N THE ENGINE IS TARTED THE TAC GOES TO ZEROOR SOMETIMES TO FULL MAX. WHAT COULD BE THE PROBLEM. I CHNAGED THE TAC FILTER AND NO CHANGE TO THIS PROBLEM?

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  • Bruce Hathcock May 11, 2010

    never heard of a tac filter unless your usigng a vachumm type setup, try cleaning the ground and check the connections on the coil to see if they are loose.

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Tach itself is bad

Posted on Jul 24, 2009

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