No tach signal
Thread Starter
Launching!
Joined: Jul 2004
Posts: 223
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From: Potomac, MD
No tach signal Don't seem to have tach signal, at least I can't get tach to work. Tried a couple of tachs. I have a speartech harness using white wire. Any ideas. I know its a 4 cyl signal
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
Some applications, tachs, etc. need a pull-up resistor to "boost" the signal.
Try a 10K resistor with one side hooked to your switched 12 volts (ignition switch) and the other side tied to where the wire from your tach is hooked to the tach wire from the harness.
Try a 10K resistor with one side hooked to your switched 12 volts (ignition switch) and the other side tied to where the wire from your tach is hooked to the tach wire from the harness.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
