6.0 long crank low icp

[arnold914]

hello I am having a serious problem my 05 6.0 just wouldn't start one day I have narrowed it down to low icp pressure. There are no code being thrown I have replaced everything I can think of that can cause low pressure but its still really hard to get started doesnt seem to matter whether its hot or cold but runs great when it starts. I have done an air test which relieved no leaks, to date I have replaced the ficm, icp, ipr, dummy plugs, stand pipes, injector O-rings, hpop, and the oil filter/Motorcraft. I still have to crank the dam thing over for more than 5 seconds to get it to build the 500psi to start hot or cold. Additionally I have tried removing the oil filter and holding drown the drain plug while cranking it fills with oil in less than 10 seconds as well as I have pulled my oil pressure regulator and it did not appear to be stuck or damaged in any way

[dieselburner21]

Does this sound like your problem?
2006 6.0 long crank time

I would also check FICM voltage just to be sure

[arnold914]

hello thank you for the link but I am afraid the I have replaced the ficm I just forgot to list it in the post. also it does not smoke nor does it start better warm. It just isnt building oil pressure fast enough.

[arnold914]

I am also wondering whether or not the oil supply screen that supplies the hpop could be clogged.

[arnold914]

the other question I have is if the hpop is good where could the leak be if I cant hear any air leaks.

[m-chan68]

How long have you actually driven it after all those parts replaced?

[arnold914]

I havent driven it, all of the parts were replaced after I started having problems

[m-chan68]

Anytime you've opened up the high pressure oil system for any time of repair, extended engine cranking time is to be expected, until you actually let it warm up to at least EOT @ 190*F and drive it for at least 20 miles under mild to WOT type load conditions to let the high pressure oil system prime up.

[arnold914]

well I havent driven it 20 miles but I have driven it about 2 miles after it reached operating temp it runs great but nothing has changed as far as cranking times but I will give it a try thank you.