2005 ford 6.0 no start Need some help please on trouble shooting/repair. No Mods vehicle is a stock F-350 with 110k miles. I am original owner. I installed a 9'2" boss plow on vehicle upon purchase of truck.
While driving (snow plowing) the engine shut off as though I turned the key off, no warning had plenty of power.


Using a snap on modus scanner


-ICP reaches desired 1500 PSI plus. I did unplug for default still no start.
-IRP starts at 15% and ramps up to 85% then drops down to 45-55%. IPR was replaced approximately at 100k miles on vehicle.
-ficm input voltage 12.5 v
-ficm voltage 48.2 and at cranking stays above 48 volts
-ficm sycs
-ficm was replaced around 95k miles, due to failure low voltage.
- checked ground wire from ficm to left rear corner of intake OK.
-Fuel pressure at test port 62 PSI, filters good.
-bubble test and balloon test done, no pressure push back found.
-Buzz test all injectors click good.
-checked all body grounds OK
-Engine cranks and occasionally fires a cylinder or two but will not start.


I have checked wiring to both cam and crank sensors continuity is good no grounds. Ohms across at PCM wiring harness to each sensor both with in spec. I live in Northern Michigan and have found cam sensor pushed out from rust and salt build up, I have removed both sensors and check for this problem OK.


Any feed back would be greatly appreciated, (frustrated)


Thanks,
Keith

 

pull the ipr and see if you have a tear in the screen if everything looks good go to the next step.which is the air test this will tell the story hands down.these hpops rarely ever go out but i'm not saying it's good either it's a process of elimination.

 

Thanks, I already started pulling IPR, though I'm reluctant as I'm seeing desired pressure at icp trying to make sense. I will let you know what I find.

 

you not looking at desired you want actual.the 1500 is what it is asking for not what it's making.when you un plug it goes to the inferred value of 850.i know some systems will show 11-1300 when you unplug and that is a false reading.

that's why i always manually check the hpo system in a situation like this.i would verify that you the ipr is in good shape if it is then air test the system.if you have scanner close off ipr or if your doing it manually use a jumper and run it out to battery and put 12 volts on it.once you have 12 volts on it apply air at least 150 psi or so and you will fined your leak.

 

I 2nd needing the actual icp reading while cranking. If the icp actual is over 500 psi during cranking see if the fuel pulse width is anything other than 0. If you have fuel pulse width the pcm has everything needed to start (150 rpm, 500 psi icp, crank cam sync and ficm sync). This will narrow down glow plug/ mechanical problem from electrical/icp

 

Actual pressure is 2200 PSI on pressure gauge, on scanner it hits 2200 and falls back to 1450 psi. I have looked for fpw PID every where though I cant find that, snap on modus scanner any idea where to find? I pulled IRP and found screen in good shape no debris.

 

One thing noted, scanner is showing 110 max RPM,, I have a new starter on it and have 13.4 volts, with charger connected. The engine is for sure rolling over well above what the scanner is showing.