2003 6.0 psd cutting out
 

throwing codes for crank and cam sensor replaced both still does not work put in new pcm and checked wiring harness ficm tests ok also any ideas. at first it yould cut out at 15 psi now its at like 3psi. 3 shops and no answers need help

still throwing the codes? what psi are you talking about fuel? boost?

Psi boost and check engine light cam back on with the same codes

if it were me i would probably take the timing cover off and check the crank gear, it has possibly spun on the crank throwing everything out of time

seen this happen on a duramax took forever to figure out

damn that sucks its on the back of the motor im so done with ford. thanks for the info will get the shop to check hope thats the problem. if any one else has had this problem let me know. and ill update.

Not a timing issue,,,, could be just a connector, check the main plug at the fire wall and the other connectors for the system.

ok so you r saying its not timing its electrical.

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Also it runs fine with no boost.

if it runs fine with no boost and only cuts out with boost it may be a fuel issue because when it boosts with too little fuel it will put the fire out// check filters and furl pump output, not sure how to check output but someone on here should.

new fuel pump 4 months ago and new filter 2500 miles ago having shop check wiring harness and mass air flow sensor.

i just ran into this problem the other day. i work in a diesel shop and i specialize on these junk motors from ford. you need to remove your egr valve at the front of the motor next to the intake from the intercooler. clean it off with some brrakleen and check inside for carbon dust. you can suck it out with a vacuum cleaner.