Can the fuel gauge on a 1998 model be functional without being pinned into the new PCM??? I can't get mine to work at all, I have the purple wire for the gauge and the purple with white stripe from the tank spliced together and the gauge reads past full
The 1998 Fuel Gauge is controlled by PWM. Its signal has to come from the PCM. The fuel sender outputs to the PCM and the PCM outputs to the fuel gauge.
Jeff
98 GMC RCSB 2wd, 100% internally stock 305, w/twin T-3 junkyard turbos,Ramjet intake w/42lb inj,12200411 PCM. 4675lbs w/me in it. Best time in 5 passes 13.01@110