can you bench test a HPOP

[tails101]

i was wondering if theres a test out there to bench test a hpop. i think my went bad last night i went to start the truck and it started up fine was letting it warm up went back out to go home and found that the truck had died. tried restarting and it wouldnt. I am only getting about 175 psi on the icp.

[forddieseldoctor]

What year is this truck? And there is no way to test a hpop outside of the truck to the best of my knowledge.

[tails101]

Its a 2005

[forddieseldoctor]

Did it restart after it got cold? Have you ever had an stc fitting replaced? It is located at the outlet of the pump. That is a very common spot for a leak. Remove the pump cover and put air pressure to the high pressure oil system and close the ipr valve and look and listen for air leaks. Pumps are not a very common failure on the 05's.

[tails101]

Yeah I've replaced the sct and both stand pipes and dummy plugs in the oil rails and no it won't start when its cold

[forddieseldoctor]

You replaced them both since it died and still no start? Does your oil pressure gauge move in the dash after you crank for a little bit? Otherwise you may have a bad ipr valve. The valve would be tested with the air test.

[tails101]

No I replaced them earlier I've been having this no start after warm problem for awhile now and so I replaced all of that thinking that was the problem it also has new ipr and icp and the air test was good I couldn't here any air and I maintained 100 psi I think my pump is weak

[forddieseldoctor]

When did you replace the ipr valve? After it didn't start or before?

[tails101]

Before, it has less than 1200 miles on it

[forddieseldoctor]

Have you air tested it now that you have a no start?