so ive been fighting with this truck for 3 months, originally came in to the shop for not running. found out the truck was never regened and the intake and swirl valves were so clogged you couldn't see threw them. replaced that and went ahead and did a egr delete as well with a tune from motor ops. truck ran great, customer came and got it and drove it for two days before it shut off and wouldn't start back. motor turns over free as can be but its not getting fuel to the rail. live data is showing that the fuel pressure sensor is 31980psi there for the ecm wont send it any fuel, ohmed the wires from the sensor to pcm connector all ohmed good, figured it had to be the pcm. sent it off guy supposedly fixed the pcm, installed it Friday, still shows maxxed out pressure and no start. the truck has had absolutely no DTC'S in it since it returned from dying. as far as i can tell by the wiring diagrams the fuel pressure sensor is its own circuit as far as the 5v reference goes (it does not have a 5v reference by the way) and as i said all 3 wires from the pig tail to pcm connector ohm good. the guy that we sent the computer from said that other sensors run off the same driver internally of the pcm, does anyone know what sensors could be running off that same 5v reference that could be shorting it out?
note to add all of the egr stuff is unplugged
note to add all of the egr stuff is unplugged
