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What are the symptoms of a failing high pressure fuel pump?
Short version: 2014 f250 takes about 10 seconds of cranking to finally build 5000 psi fuel to start. when it starts it runs really rough and makes a squealing + knocking sound like a spun rod bearing. Truck started fast and ran fine then this suddenly started. Is this a failing high pressure fuel pump or something else?
I have a 2014 f250 that I just picked up from auction so i dont know the history. It started quickly and consitnely for a couple days in my shop, no obvious issues. First test drive it was driving fine down the road for about 3 miles then i slowed down to pull a u turn and the truck just died, no sounds. tried to crank it and the engine acted like it was locked up. only code was a cylinder 3 contribution code. I pulled the 3 injector and tried to crank engine, still locked. 2 new batteries, still locked. waited till the next day then the truck started to crank "fine" but would not start because low fuel pressure. after lots of cranking it did start but runs very badly.