Anyone in here good at diagnostics on a 6.0 ford?

[gonefishin]

I’m beating my head against the wall with this 6.0. When it was brought to me it would barely run and smoked horribly. My scanner was showing about 24-38 volts on the ficm. So I replaced it. Truck ran great for about a day. Customer brought it back because it dies after running about a minute.

So far I’ve checked fuel filters, fuel pressure maintains right at 50 psi at the fuel filter housing while idling right up until it dies. It never loses any pressure. All the oil injection pressure, ipr, etc looks good. Truck has no codes other than a turbo performance/underboost code.

When truck starts to die it does not respond to the throttle. It’s like it’s running out of fuel. Let it sit a minute or two and it will start again.

 

[centexk5]

You see that sign that says 6.0? There’s your problem.

 

[Wes Harden]

Sounds like the ficm to me, was new or rebuilt ?

 

[gonefishin]

Rebuilt from auto zone.

 

[tRustyK5]

You mean there is a 6.blow out there that still runs?

 

[Wes Harden]

6. Oh No and it did till recently.

Yeah something in ficm is going open at whatever temperature.

 

[Chickntrk]

My money is on FICM or IPR, I’ve seen IPRs come and go without a code…we had a whole fleet of these at Penndot, I’d still take a 6.0 over a 6.4, now that was a pile…

 

[Truckman4life]

Best way to go on a ficm is to just do a bottom half kit, no programming required and that's the part that fails. I'm not sure who offers them any more as I haven't had to do one in years. I used to get them from International and also Ford. The Bulletproof Diesel ones are nice but you do not need the 58 volt upgrade one unless you have a ton of stuff done performance wise to the engine. 50 psi is low on one of those also for fuel pressure. It will run better if you do the blue spring regulator and get it up closer to 65 psi. I always had a test ficm and I think I still do and would swap it in when trying to verify what it was doing. I actually like the 6.0L when they run good. I have one for my run around truck at work, it's the best running one I've ever driven.

 

[Wes Harden]

Other than being held hostage to the fickle ficm, once all of the bean counting cost savings have been addressed and the but hurt cc payments are done. The 6.0 is an ok engine.
But why should we buy 50k truck and spend 10 12k making dependable, not up dates or improvement but just trust worthy

 

[max 02]

The 6.0 can be excellent if you spend the money and time upgrading all the problems they have. But then some crackhead will steal it.

They sure sound cool.

 

[Chickntrk]

Just like most diesels now, emissions garbage really hurt those engines…..EGR coolers, EGR valves, hard to force a diesel to eat it’s own shit all the time and run well….they came out right in 06-07 when companies were still figuring out emissions on diesels…