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Quote from: TommyH on October 21, 2019, 04:58:05 PMI looked again at the pics I took of the scan tool, I also had a P1280 code. ICP circut our of range low.Wouldn't focus on that. Likely got that code when you tried running it without the ICP sensor plugged in. I would have cleared the codes and then tried to start it again and checked once more for codes. Also, would be ideal if you could get ICP psi # and IPR duty cycle %. Need to know if you are getting enough high pressure oil to fire injectors.
I looked again at the pics I took of the scan tool, I also had a P1280 code. ICP circut our of range low.
You need to check ipr percentage and see if the icp sensor is reading any psi. If your ipr percentage goes way up ( such as 80% or higher) then you have an internal leak somewhere. Normal % is around 25-35 to start up. Also you are looking at more than 500 psi from your icp for start up. On the scanner you should see desired and actual. If those are both good I would lean towards an ecm. All of your injectors don’t just fail. I’ve seen bad fuel go thru injectors multiple times. I’ve had this same thing happen with a bad ipr valve. That is what helps build psi in the hpop system. Don’t just throw parts at it. It gets expensive real quick. Especially with a diesel. Try not to crank the engine more than 30 seconds at a time with a few minute cool down. You’ll be putting a starter in it.Ecm = IDM ? ICP pressure @2554 indicates hpop is fine correct...? IPR % at 39 while cranking, so assuming it’s ok, (and *new* but Napa parts, CPS was autozone,) I’m left thinking my ipr (new) is working, cps is new (autozone) hpop is making pressure according it icp....? I’m leaning to IDM failure.? Uvch/gaskets would only be one bank or another, I’d have smoke out the tailpipe, and injectors injecting on one bank. Not a die while driving, not a no smoke out the pipe, and most likely would run, even on four injectors working.
You said it happend after driving around in the rain? The idm on your superduty is behind the fender I believe so it is very possible it got wet (sure it’s sealed good but seals can go bad) and went bad. Hope you get it working soon.
Your ipr is fine but if the icp goes straight to 2554 while cranking that does not seem right. It should be around 725. 2550 should be the max if that pump was dead headed. If there is no smoke from the exhaust then there is no fuel being injected into the cylinder. You can try swapping your buddies IDM. Try swapping the icp also. See what happens.