engine stalls, but always restarts again

[95Harley]

Guys;

I need some Help here. I have a 2005 F350 6.0L with 100,000 miles on it. I have had the following replaced in the last 25,000miles:
- Turbo
- CPU
- Complete Wire harness
- EGR cooler
- Heads (had ARP studs installed)

Truck ran great for the 19,000 miles, now it's acting up.

The engine will just out of the blue DIE, Intially I would immediately pull over and turn the ignition off, then it woulf fire right up no problem. After it had done this a couple more times I tried to simply restart the motor with the tranny in N, still rolling, and started fine.
Last week I was driving and my truck started to loose power while driving, and when I finally came to a stop it idled like it was missing on a cylinder or 2. I pulled over as soon as I could shut the engine off, restarted it and all was fine. The next day the truck died on my 3 times in 5 miles, and I finally had enough back to the dealer it went.


When it is all said and done the dealer checked everything, including fuel rails all wiring etc. the only code that was found was for low oil pressure.
Replaced the oil pressure switch and got sent on my way.

Sure as heck 2 days later my truck dies again, but restarts immediately and performs like a champ.

I really don't like my dealers approach to the problem, It was my idea to switch the oil pressure switch. Noe they will want to replace every sensor 1 at a time, until problem is fixed. Worse case they do that and then replace the FICM.

DOES ANYONE HAVE AN IDEA WHY A 6.0L WOULD DIE, THEN START UP RIGHT AWAY NO PROBLEMS?

Thanks for your help.

[95Harley]

Any one have any ideas? Even some far out crazy ideas?

my 97 did that, ended up being the CPS

[Trigger5150]

Our truck is in the shop right now with a branch fitting problem. Basically, it's a high pressure oil problem. Sounds like exactly what I'm dealing with.

[npccpartsman]

Usually the problem with the branch fitting is that the truck will have a hard/long crank to start or completely not start because the HPO isn't firing the injectors due to no oil. When the OP says he had a low oil pressure code I find that strange because I do not believe that the oil pressure gauge in the dash is even read by the computer since it's basically a dummy anyway (only takes 7.5 psi to make it read normal).

To the OP.......do you know the code thrown by the computer??? This definitely sounds initially like an electrical problem but without knowing the code it's hard to pin down. I confirmed that the computer does NOT read the dash oil pressure gauge, so it's something also related to the HPO system like the ICP sensor. There are several oil related codes. Please do NOT let the dealership start throwing expensive parts at it until you get a new code reading. I'm willing to bet that your code is back.

It most definitely is NOT the EGR or CPS as suggested by some. The CPS on a 6.0 has an extremely low failure rate. I know of 2 that have actually failed electrically. Most are for leaks.

[Tyler]

Still could be the EGR again.

[Trigger5150]

Originally Posted by npccpartsman

Usually the problem with the branch fitting is that the truck will have a hard/long crank to start or completely not start because the HPO isn't firing the injectors due to no oil. When the OP says he had a low oil pressure code I find that strange because I do not believe that the oil pressure gauge in the dash is even read by the computer since it's basically a dummy anyway (only takes 7.5 psi to make it read normal).

I agree, but what's weird is that on my truck, the mechanic got it started after long cranking and within a couple minutes the truck stalled and then would restart and stall again. Now it's been at the shop for a week and they are telling me they had to replace the branch fitting. This is after they changed the high pressure oil line under the valve covers. If I ever get the damn thing back, I'll let the OP know exactly what all they replaced, but the stalling certainly sounds like the same problem I'm having.

[95Harley]

OK, Just had my truck scanned. The only code present is low injector pressure.
They want to replace my IPR sensor now????

Has anyone heard of the Diablo Pedator programmer effecting other diesels periodically like this?
I ask because I put my truck back to stock, and after about 120 miles it hasn't stalled in the last 400 miles?

[firefighter254]

ask them to check the volt's on the FICM i had that problem and it was the FICM

[95Harley]

Thanks Fire fighter, cause that is exactly what I was thinking. The dealership told me that if the scanner didn't pickup a FICM code there was nothing wrong with it. I asked them about the output volt test and they looked at me like I was a %^&&*&^ idiot. I think this is something a guy could do on his own with a voltmeter.
Anybody have an Idea what wires you would stick the + and - to?