6.0 Head Scratcher

Marty

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2003 6.0 with blown gaskets had No start condition so cab was lifted, while cab was up the following mods were done.

Mods 3 years ago:
EGR Delete
New HPOP
Fuel System
Stud Job


Truck sat and never started. Rag in intake manifold truck left outside. Owner decides to work on it so we tow it to shop....

New Mods;
Oil Cooler
Warren 190's
Powermax


Problems fixed;
IPR
Leaky upper injector O rings
Broken Crank Wire
New Batteries




Where I am now......
New IPR, first one would only make 200 psi.
Replaced two injectors for upper injector o ring issues (air test)
New strong batteries; battery charger and jump pack also hooked up for cranking.
Swapped FICMs, even though didn't think that was problem.
Swapped PCM's, same as above.
Making 1500 or so PSI of ICP cranking
60+ Duty cycle IPR
Regulated fuel system 60 psi, checked and fuel is flowing freely out of rear of each head.
Passes buzz test
No codes that matter IE:(egr codes/stock pcm, wheel speed sensor, etc)
FICM MP: 12.0 KOEO, 11.5 End of cranking. FICM LP 47.5-48 all the time.

It does crank slow, averaging 130-170 cranking RPM.

All numbers confirmed between AutoE and Ford's IDS.

Tomorrow I am going to check FICM sync and then do a compression test. The truck does not fire off ether, nor does it try. In fact the ether slows down the cranking RPM and ICP takes a nose dive.


It has battery voltage, electrical continuity, fuel pressure, ICP, air, etc....

There is no smoke coming out of the exhaust (no cat or muffler) while cranking unless ether is sprayed in. So that tells me regardless of compression that it's not getting fuel sprayed in. I don't know...
Wondering if anybody had some input. What am I overlooking. I spoke to my buddy Scott tonight about it on the phone and still kind of unsure where else to go with it.
 
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Marty

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Yeah buddy that's where I'm at right now. Kinda thinking the injectors aren't firing even though they pass buzz. I'm on phone now not computer so not writing anymore then I have to.
 

Dieselcraft

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Marty it says had a bad crank wire? What did that concern come from?

Do you have good grounds. It sounds like a electrical issue maybe a compression issue.
Is the fuel air locked?

Clean diesel?

Is the air flow restricted?
 

Bustedknuckles

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Ether shouldnt slow down cranking speed, especially if its not getting fuel from the injectors, i wonder whats up with that?
 

Dieselcraft

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If a broken branch tube was the case it would fail air test.
If a bad stand pipe would slow or restrict oil to bank of injectors.

Did you check for compression gas in fuel?
 

Marty

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Air fine.
Fuel coming cleanly out of return line. 60psi.
No rpm on ids or AE. Repaired wire now works.
grounds.... everything is working properly.
Completely empty tank before I put new fuel in a week or so ago..
 

Powerstrokeracing

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So it's most likely not an oiling problem. Sounds like it could be a ficm/injector issue. Thats a tough one. Good luck
 

Dieselcraft

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^ ?
What's your icp voltage?
Have you tryd a test ckp sensor?
If your building 1200 psi of icp at bellow 550-600 rpms sounds Lil fishy? HMM

It came in running at first repair?
 

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