Compression Ignition Addict
Join Date: Jun 2013
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Being a fire truck....who knows what was tapped into when it was outfitted with the grass rig.
Does it have an auto charge? does it have a diesel fire pump possibly tied into the factory fuel tank? before or after the pump ive seen both.
were there any emergency equiptment wiring or outfitter wiring run down the frame rail near the factory harness that could be hiding or causing chaffing against the frame? these trucks have tons of wires to run anything from generator starters, booster reels, scene lighting, 50,000 different emergency lights. in cab controlled deck guns and bumper monitors. and my experience is some companies that outfit these trucks do better then others with wiring. some are over complicated and cause issues. some are simple and keep on working.
we had a truck that gave us trouble everytime you turned the emergency lights on the factory horn would honk and the dome light would flash intermittantly on a 550 chassis.
on edit i see you found your problem
on a 7.3PSD ive never heard of a FSS. i thought that was a mechanical motor thing. but i can see an oil pressure switch if it looses pressure it kills the pump, but again that sounds like a mechanical motor set up as a PSD computer monitors that stuff and it wont run without oil anyways.
but im not up on all the 7.3 stuff as much as i need to be compared to the newer motors. its been a while since ive had one besides the IDIT
94 F350 xlt, 4x4, 7.3 idi turbo cc/lb 36" maxis buck shots getting paint!!!
06 F2504x4 PSD KR, H11studs,175/75's from warren ordered!!,idp tuned ficm egr delete IDP Custom tunes mbrp 5" edge Insight cts with pyro and isspro fuel pressure gauge, air dog 165 to put on and turbo to order RCD 68mm or powermax modded
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