Brand new Interstate batteries whirl the engine.
Truck has sat for 4 years. When last ran, started in less than one revolution and ran fine. I've owned for 10 years.
After 2 seconds on the WTS light found one glowplug with open circuit. Replaced all. 12 seconds + now.
Dinky Faucet suspected of not doing it's job and replaced with Faucet Duralift.
New fuel filter.
Pressure gauge inline to IP holds 4+ PSI steady. (all air bled)
Clear fuel return line on drivers side running as it always did.
With pump running and ignition switch to run, no fuel coming out of IP bypass clear tubing.
Two wires connected to the top of IP were checked for current with key in run position.
Both showed 9 volt +/-. (questionable test connections could be dropping voltage)
One wire is red and runs to the IP connection closest to the dash. The other is yellow and also runs to a solenoid that sits against a throttle plate that is hinged to the IP.
I read in another thread that if "no fuel from IP bypass, then no start".
So what's next? New shut off switch?
Is shut off switch the red or the yellow connection.......and what is the other?
Thanks for any input or suggestions.