02 7.3 shut down issue

[repo]

Hello to all,HELP i got a 02 F-450 that is randomly shutting down at idle or on hyw it dosnt matter,with pto on or off no diff.
Heres wat its doing itll start right up drive 100% for 15 to 30 min n its like someone shut the key off,go to start it n it turns over normally fast but wont fire,leave it for 10 to 45 min n itll start right up n drive like nothing happened for a nother 15 to 30 min n dose it all over again n again.....

Heres wat weve done so far,changed all breakers,changed can/crank sensor,rooled out feul issue,cheacked all wires n conectors,tryed a nother PCM from one a the other 4 7.3s i got(starts runs drives n shuts down no diffrent) not sure were to go at this point if anyone has any input at all other then selling it, it would be greatly appreciated....

in a the same issue with my other 7.3s we changed the cam/crank sensor n problem solved but not this one......

[RICHARD @ LINE-X CV]

Check your oil level...DID YOU TRY A DIFFERENT IDM? LOOK YOR THE WIRES RUBBING WHERE THE 40 PIN CONNECTOR ABOVE THE LEFT VALVE COVER IS AND ALSO THE DRIVERS SHOCK TOWER. THEY RUB THERE SOMETIMES.

[repo]

Check your oil level...DID YOU TRY A DIFFERENT IDM? LOOK YOR THE WIRES RUBBING WHERE THE 40 PIN CONNECTOR ABOVE THE LEFT VALVE COVER IS AND ALSO THE DRIVERS SHOCK TOWER. THEY RUB THERE SOMETIMES.

i myself checked the wirering n did not find any issues there but my tech is gona go through all conections n check wires thoraly(im not a mechanic)
what exactly is the IDM n where is located???

[2005F250]

Sounds like an oil issue. How is the low pressure oil pump pressure? Could it also be an IPR issue?

[repo]

OK new day new input, still not sure wat n were the IPR is but we tryed a couple a other things, my trucks got PTOs n have a seperate computer on the floor to control the PTO n throttle up, on the 02 with the problem today playen around to find the cuer to my shut down prob the pto wouldnt ingage all the time n the more we played with it more that the pto would not ingage untill it didnt ingage at all now, so i took the pto computer out a the problemed truck n put it in a nother truck n it ingaged the pto every time so we put the scanner back on the problemed truck n played some more n it finally through a PCM code twice so tomorrow morning were ordering in a PCM

does anyone no if i can cross ref part#s on PCMs to no wat other used ones would work or is it a Ford order in unit n thats it?????

[repo]

all right more info: pulled off batterie covers to load test batteries n found drivers side batt had a big crack on top by the neg poast, threw in 2 new batteries n played a little more n no more code poped up but problem was still there,found were ICP n IPR sencers are n priced them out "ouch",

does anyone no if eather ipr or icp can be bench tested in any way becouse there not throwing a code at all, or is it normal for them to melfunction n not throw codes????

[repo]

ok we got a proper scaner on this truck n it pulled a crank senser code, so we changed it (for the second time) with a new one n no more code
when it shuts down n no start the fuel pressure wen trying to restart is only pushen 65 to 150 psi itll jump to 450 for a fraction of a sec off n on n then back down to under 100psi, it did pull a icp code once but wen it is runing we unpluged the icp n itll still run n restart fine????
now with the fuel presure down on a shut down restarts, if we change the ipr will this corect that or is that normal for starting psi ?????

[repo]

oh ya we havent ordered a pcm yet do to ford discontinued them n a jober is a 2 week back order, n with the proper scaner on it were weaning out the codes 1 by 1....

[sanger]

Wow, sorry for the bad luck, I have no ideas for you but good luck with the fix.

[repo]

ALL RIGHT, oil pressures were up n volts were a ok for all functions so we changed out the IPR, i took it out put on 50-60miles n no shut down, sent the truck out last night for a mountain reacovery (75miles in) n its still out on call working 100%

so 2 cam sensors(one faulty from ford new), freash oil change, new fuel filter n air filter,pull apart all wire conectors n clean em, n the main colpert chage out the IPR

2 tanks a fuel n still runing.... BIG THANKS to all for the input, great sight n great bunch a guys hear any one need any help that i can provide poast a thread on this thread n ill reaply......