Join Date: Mar 2014
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I have an '01 F250 that I bought not running. 160,000 miles on the truck. Got it running but it was VERY hard starting and ran very rough. Buzz test at that point revealed 3 injectors that sounded solid and deep tone, 5 that sounded like baby crickets. Removed oil pressure regulator from back of hpop and cleaned it (it was very dirty). Wouldn't start after that. Buzz test after that showed no injectors really trying to do anything. Made mechanical gauge and plumbed it to high pressure rail. Makes too much pressure when cranking (over 2,500 psi). This truck was subjected to LOTS of low voltage cranking before and after I bought it. Unplugging the ICP sensor did not reduce the oil pressure.
My question is: if I finished off the IDM with all of the low voltage cranking, would that essentially be making the hpop deadhead since it isn't firing the injectors and cause the high pressure? I am tempted to buy an IDM and see if that makes it run, but wanted a sanity check before I spent the money. I have very little invested at this point and could easily sell it as is and get my money back. I had essentially given up and was about to sell it but the whole "deadheading the hpop because the IDM is toast" theory popped into my head.
I had done lots of searching to try to see if I was barking up the right tree, but couldn't find any specific info on the subject. Any help would be much appreciated. Thanks.