Hey folks been awhile. Been on the road, was on my was to yard the other day 70 mph all SG #'s good. Then my 2004 (late) 6.0 ( Big Baby) she died on me, had power, FICM 47.5-48. ICP all over the place but never saw 15 or 85, IPR 24.3 /Volts 13.5. /FICM v 12.8. Drug her home replaced ICP, IPR with batts dc'd, dropped oil no debris found. Even poured it thru coffee filter (paint filters) to see shavings, floaters, dirt etc. Clean but change time anyway, new filter. So all this still no start? Cranks like normal but not even trying to run, so on to fuel.
Pump working, injectors clattering on pre-start. SG pressure 100%, yes I'm sync'd while cranking then faults back to 0.
Fuel in bowl, drains cap off and there is pressure while cap being removed, refills cycling key, new filter at bowl recent change at pump but not so new as to be suspect?. No water in fuel, 3/4 full tank have not seen any form of tank corrosion at filters it really looked good.
Back to ICP, switched ICP pigtail still no crank. Oil pressure 350ish climbing to 650's KOEOff. Cranking pressure goes 900's to 1590? What am I forgetting? What am I missing? I know I know a brain but I LOVE THIS TRUCK. I'm back on road and "big baby" sits in driveway in Arlington,Tx. ANY and ALL comments, questions, etc. welcome. Please help she's too young to die.
God Speed to our fallen 5.

 

What is FICM main volts I assume you are showing FICM logic volts.

Well you edited after I posted.

 

Hey I'm just south of Dallas. What does SG pressure at 100% mean?

Sounds to me like a high pressure oil leak Or bad hpop What is your icp and ipr while cranking? Need icp min 500 to crank. Ipr max is 85%. If your seeing 85 then it's a high pressure leak like dummy plugs or stand pipes

Good luck

 

Post sensors values @ KOEO and again @ Crank
Looking for 2 Solid numbers for each sensor/actuator under each condition posted^^


Your ICP and IPR% numbers look switched are they?
For clarity Id recheck and post them all again


in addition to what you posted already
crank rpm
FPW

 

If your sync is zero.... that needs fixed.

 

SG Fuel Pressure. I don't have actual % it's either 100% or O%.
Well I needed to dive into HPOP anyway so that's next. Thanks Fire.

 

Do an air pressure test before you tear it apart. You will just be throwing parts at it otherwise.

 

Will check all values again but like I said I'm on the road again so it'll have to wait unless a shop ( cringe) comes and gets it. BLADES I'm sure your right, having wife get pics of SGII KOEO values to me. I know I never saw 15 or 85 as ICP value on SGII, came close 14.7 and 40's cranking. There just talking about it recalled that. IPR If I'm not scrambled was 21's to upper 48's maybe? But I'll double check #'s I wrote 'em down and left them with big baby. WATSON, I am in sync, I should have relayed that, otherwise the #'s KOEO would mean squat. It changes to a 1 or sync when cranking.
TIDEMAN, I'll run down down all my #'s as soon as I can get my wife to go out hook up batts and give em to me. Thanks all, maybe an air test via ICP is in order too. ?????

 

Also scan gauge does not read fuel pressure on a 6.0. There is no sensor for that. You would need to add a pressure sensor and gauge to read fuel pressure.