Tach errors

Gotta love that wiring . . .
Budduncan
Posts: 56
Joined: Wed Sep 07, 2011 8:15 pm
Your car is a: 1971 Spider

Tach errors

Postby Budduncan » Sun Oct 08, 2017 7:06 pm

My 71 runs fine but my tach when working is always well below estimated rpm. Sometimes it fails to register at all but generally starts working after driving a while but never seems accurate. Any suggestions as to how to troubleshoot? Where does the tech gets its signal? Thanks for any advice.

ORFORD2004
Posts: 797
Joined: Wed Mar 17, 2010 9:48 pm
Your car is a: 1983 PININFARINA
Location: Sherbrooke, Qc, Canada

Re: Tach errors

Postby ORFORD2004 » Sun Oct 08, 2017 8:53 pm

Where does the tech gets its signal?

negative pin on the coil.

Budduncan
Posts: 56
Joined: Wed Sep 07, 2011 8:15 pm
Your car is a: 1971 Spider

Re: Tach errors

Postby Budduncan » Mon Oct 09, 2017 5:54 pm

Thanks. I will try cleaning the connection at the coil. I have a lot of spare gauges, but no spare tach.

ORFORD2004
Posts: 797
Joined: Wed Mar 17, 2010 9:48 pm
Your car is a: 1983 PININFARINA
Location: Sherbrooke, Qc, Canada

Re: Tach errors

Postby ORFORD2004 » Mon Oct 09, 2017 7:04 pm

I think I have one.


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