I have been noticing a difference in the RPM my tach is showing when I'm cruising on the Hwy. In the cool of the morning...about 5am...heading to work, I am seeing 2000rpm at approx 100Km/h. But in the heat of the day, late afternoon heading home, I am seeing 1850-1900 going the same speed.
I never saw any fluctuations before when I was running the magnetic tach signal pick up on the harmonic balancer, and this very same Isspro tach.
Only thing I can think of is maybe the CPS is going bad, or there is a weak link in the wiring? And the heat of the day is causing a deterioration of the CPS signal?
Thoughts, ideas?
92/93 Tach signal variance....
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92/93 Tach signal variance....
by thrashingcows » Tue Sep 16, 2014 11:39 am
1984/93 Dodge Crewcab, W350, 1 Ton SRW, long box, 330K Km's, M&H spacer, 366 spring, fuel pin to deep side, 14cm housing, Piston LP, PS IC, Isspro Boost, Pyro and tach, NV4500, 29 spline NP205, 3.54's.
Check out the build....http://www.dieseltruckresource.com/dev/ ... 05923.html
Check out the build....http://www.dieseltruckresource.com/dev/ ... 05923.html
- thrashingcows
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