I think the FICM is bad

[stumiister]

I have company service truck it's a early 2006 F450 with the 6.0 in it.
I was getting on the freeway and by the time I got the the next exit the engine had shut off, no warning, no check engine light, it just stalled out.
It cranks good, checked for fault codes there are none
Checked the fuses they are all good
Also I need a diagram for the fuse panel
To me the way it's acting is the injectors don't want to fire.
If I could get some help with this it would be great thank you.

 

[Rdnck84_03]

You need a way to look at actual numbers while cranking, I use a snap-on scanner. There are far too many things on those that can cause the issues you described for anyone to give you a good answer.

Things you can try without a scanner, is to try starting it with the ICP sensor unplugged. Then I would test the fuel pressure.

Most everything after that will will need a scanner.

James

 

[bismic1]

If you end up convinced it is the FICM, have it rebuilt and upgraded at either FICMRepair.com or CircuitBoardMedics.com. It is cheaper and better than buying a new FICM.

Sadly, sending in the FICM is the only way a logic board can be tested.

The FICM can cause intermittent stalls, but so can the IPR (or its connector/wiring).

Several other less common issues can cause it as well (shorted injector coils is one).

Since you posted that you checked for codes, what are you using as a scan tool (because MANY scan tools do not read codes thoroughly)?

FORScan is the best and the cost is low.

 

[stumiister]

So today I have checked for with a harbor freight code reader, it said no codes.
I tried using starting Fluid all it does it crank faster.
The dash shows no oil pressure and the scan tool I was using shows no oil pressure also.

 

[bismic1]

I have no confidence in Harbor Freight scan tools (Zurich) for the 6.0L (not for code reading anyway). Only a few scan tools are truly thorough in retrieving all of them. Of those FORScan and Torque Pro are the ones that are very cost effective.

When an engine stalls, there is almost always a code for that (cam/crank code).

You won't get base oil pressure from ANY scan tool - there is no sensor for it. If you see a PID for oil pressure, then it is for the high pressure oil system.

The DASH GAUGE for base oil pressure comes from a simple switch. At 5-7 psi, the switch is engaged and the reading on the dash goes to mid-scale. Doesn't change when oil pressure goes any higher than that.

If you have no indication of base oil pressure when cranking, then it would be helpful to put a manual gauge on the system to see if you really don't have any pressure, or it is a problem with the switch.

No base oil pressure (if it truly is a low pressure issue and not a switch issue) can be due to several things.
LPOP damaged
Low Pressure regulator stuck
Leak on the suction side of the high pressure oil pump system (ie on the HPOP feed)
Base engine issues

---

The '05 and up HPOPs were very reliable and had few issues, but the one thing that MIGHT impact the base oil pressure would be a complete failure of the discharge (STC) fitting.

Just a reminder - starting fluid is generally not a great idea.

Watching the PIDs for ICP pressure, ICP sensor volts, IPR % Duty Cycle, Cam/Crank Sync, FICM Sync, Injector Pulse Width ............. is a VERY good idea.

 

[stumiister]

I don't have a good scan tool to read all the live data, also it is a company truck I think the boss may have it towed someplace to get it fixed, I just don't have the time to mess with it.