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Discussion Starter #1
I HOPE ONE OF YOUALL CAN HELP. i JUST CHANGED OUT THE EXAUST y PIPE on an 03 --6.0. put new IPR valve & ICP with new ends on both as they had been melted from hot ex. Also cleaned the turbo & checked the solinoid. All seem to be ok. My old vcm indicated I had a problem with CMP. Put in a new one as they aren't expensive. Got it buttoned up and when it started, I got the usual hit & miss untill yhe air was purged from high press. oil. Now it starts with no problem(2.5 seconds crank time)but only runs for 10 seconds and just dies. Abruptly. Let it sit for 1/2 minute and do another start,run,die.HELP. My VCM died and is in the shop so I don't have a source to check with. Any ideas???????:bdh:help
 

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If the truck ran before the work was done and now it won't, need to recheck the repair steps. Having a ScanGauge2 would help tremendously in reading actual values from sensors replaced. Since the IPR and ICP are close to each other on 03' models, you didn't by chance get the wires mixed up? It probably has to be one of the sensors replaced, as the turbo and exhaust repairs would not cause it to not run. Another possibility is a weak FICM. Recheck all connections of everything that was taken apart. Lets us know what you find, and good luck.

Harry
 

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Discussion Starter #3
Thanks Harry for the reply. The truck was DOA when it was trailered in. The Y pipe was broken in 2 places due to the owners previous egr delete self help. Consequently, the ex. gas burned off the wires on the icp & ipr. Replaced both plus new wire ends. the icp has 3 wires. the ipr has only 2. Before my vcm died the death, it showed a bad cmp and no ficm sync. I replaced the cmp. The eng. starts good and will idle for 10 seconds then die . It doesn't matter if I rev the eng, it still runs for 10 sec. Makes me believe it is something in ign. circuit. Will have to borrow a friends MODUS. All help is appreciated. Seems the more I learn, the less I know. Imagine that. Thanks agn. BOB
 

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Discussion Starter #4
6.0 that runs: dies

I borrowed a snapon MODIS and got a P1725. Doesn't mean anything. Problem is the eng. will not run long enough to scan. Am in the process of air checking high pressure oil. Got the ICP out & my adapter installed and compressor died the death. Had to hoist it off my truck and disassembled all over the driveway & spent all day repairing. Tomorrow is the day of truth. I am praying something in the high press. oil is the problem. I'll let you know. Cheers.:salute:read:stars
 

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Discussion Starter #6
Do you know what your fuel pressure is? This sounds like a classic plugged filter or weak lift pump.
Thanks for your suggestion. However, When I air checked the high press. system, I found the problem. Or at least a major prob..Bad air leak on both stand pipes to the oil manifolds. Am waiting on 1 more pipe & I can check again.Thanks agn. I'll post how it goes. Tomorrow I have an allison to R&R in a Volvo tractor so can't do the 6oh until Monday. Cheers. Bob:salute
 

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Discussion Starter #7
:goodvsevilReplaced both down pipes, & guess what?. Still leaks. pulled hpop cover & found bad cover seal. Pulled pump & replaced all (o) rings, reinstalled cover and praise God, no more air leaks. Almost have it ready to start. Will let you know how it goes.---Bob:toytruck:sleep
 

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Whats the mileage on this truck? Look forward to the outcome, and hope this fixes it.

Harry
 

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Discussion Starter #9
6 oh blues

IT HAS 50XXXMILES SHOWING, BUT TRUCK IDLED ALMOST EVERY DAY FOR ALL THOSE YEARS AT DISNEY IN ORLANDO. I DID THE MATH (25 MILES=1hour) 5 days a week, for 7 hours a day etc. so 250k would be a reasonable figure for eng. miles. No big surprise that the business that bought it are having a nightmare.(So am I for that matter) I'm gitting a years worth of schooling in a short time.I am a fairly quick study, so the next one will not beas much of a problem. (maybe!)See ya---Bob:wedgie:confused::haha
 

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So I'm guessing you got it running and it's all good now?

Harry
 

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Discussion Starter #11
6 oh blues

In a nut sheel, noooo. Got it back together today, & I still have the same basic prob.. I've done the normal things that usually work. Every thing I repaired was needed. I suppose I am now down the the real problem. The MODIS says the fuel supply is 100%.? I'm not familiar with that reading. Tomorrow I will do a fuel supply test. If that is o.k., I am (will be) at an impasse. The learning curve is killing me!:goodvsevil:haha:haha &:gaah.Well, (a very deep subject) tomorrow is another day C Ya.:night
 

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What is the FICM voltage? Should read 48v at all times, a typical failing FICM can fluctuate voltages and have as low as 36v and still fire the injectors, but when it drops to 24v it will stall and not run. Like I mentioned earlier, having a Scangauge2 is a great device for these trucks (about $150 tool), as it will read all critical data for the 6.0, much more than most any scan tool out there, including SnapOn Modus. Basic parameters to make these trucks run is, fuel pressure must be 45psi or higher / hi pressure oil (ICP) must be 500psi or higher to start the engine / IPR should typically read in the 50% range when cranking over to start, once started should read 20-25% at idle, IPR range is 15-85%, 85% being fully closed and trying to build ICP as high as possible, 15% being fully open and bypassing hi pressure oil back to the pan. Good luck, and keep us posted on the outcome.

Harry
 

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Discussion Starter #13
6 OH blues

I hept messing with the modis & got the data I was looking for, sort of. It showed 12 vdc supply ., 48.5 vdc ficm & it started & ran for abt 8 or 10 seconds. The ipr was 2945 or there abouts. the icp was close to the same. Then it died, & i watched the pressures drop to nothing. Then tried it agn. & no ficm voltage & got new dtc's. 105:lost com. with ficm;2614 & 2617: CMP & CKT output open. I don't believe both are bad. CMP is new. I'm with you on bad ficm. My rotunda VCM is on the way back from repairs; should have it tomorrow. It is the real Ford deal. Will see what ti indicates.I now believe the voltage reg in the ficm is in the toilet. At this time, the eng will not fire except on starting fluid, I don't like to use it on pwr strokes. Bad news. Anywho, I had to walk away from it and do a few paying jobs.:gaah. C YA Later Bob
 

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Discussion Starter #14
:bash:ballnchainNow nethir computer (modis or Ford IDS/VCM) will communicate with the truck. This is one needle in the perverbial haystack I wish I wasn't looking for. Any suggestions? I do have 12 volts to the VCM, through the obd plug.:thinking---:help
 

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Check all fuses, especially cig lighter fuse, as it's the same one that powers up the obd2 port, even though you did say you have 12v at the obd2 already, never can be sure though.

Possible ignition switch issue too, or fuses in small relay box on drivers side engine compartment, or possibly the PCM behind the drivers battery isn't connected properly.

Thats all I can think of at the moment, may need to break out the wiring diagram.

Harry
 

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Discussion Starter #16
6.0 blues

:bang.I think my head hurts!.Last week, I had 55# fuel pressure. today , none. The pump runs, but no pressure at the fuel reg. To late today to mess with it. Tomorrow, I will plumb in a hose & a valve so I can see for myself the volume or the lack of. I should prabably stick to the old mechanicals that I know something abt. What an education!:bluesbros ain"t got nothin on me.:imok---Bob
 

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Hang in there Bob, at least you have a clear symptom to follow.

The worst ones for us techs are the intermittent symptoms that leave endless possibilities to chase. Process of elimination is sometimes the only path to follow.


Harry
 

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Discussion Starter #18
Another day, another wasted hour. Turns out, the fuel pressure came up to 55# after I purged the air. It started(with a little gasoline help) for a few seconds & the pressure stayed @55# until it died. Will not start on its own. Checked FICM voltage (should be 48) & got 0. Not sure how to check to see if it has12 vdc going in. Any help here is appreciated:bang:fan
 

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ScanGauge2 is what most of us long time 6.0 owners are using these days. Ficm logic(12v), and main power(48v), can be read from the drivers seat with one of these. Scroll down the x-gauge feature page to the Ford 6.0 diesel and you will see some of the stuff this little gem can read. Heres the link below,

http://www.scangauge.com/support/x-gauge/ford-specific-xgauges/

I would also check the small fuse box on the drivers side engine compartment and make sure the ficm fuse and relay is good. If you are turning the key on to the glow plug position and do not here the injector spool valves buzzing/clicking, then your ficm is dead.

Harry
 

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Discussion Starter #20 (Edited)
I used my logic probe to check the fuses. The one to the front(20amp) good. The next one showed negative(ground). pulled the fuse & it is good. May mean the relay is bad,;don't know which relay is for the FICM.As a side note, when I turn the key on, the injectors do thier little buzz & the fuel pump comes to life.I had 0 voltage at the FICM static or cranking.I need a schematic of this monster.:bdh:soapbox.Well, it's Saturday & instead of fishing, I get an all day welding job on a trash compactor at a paper shreading co. I told the man if the place catches fire, If the crane is up, i'll make him a new door @ no extra charge.:peelout.The 6.0 will have to wait for THOR to get here from Greece!.C Ya---Bob P.S.---Harry, can I use the scan guage like I use my IDS/VCM? I'm guessing it is meant to be installed permanently, rather than gen. diag. Thanks for your input.
 
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