The mother of all 6.0 "crank no starts" - Ford Powerstroke Diesel Forum
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Old 03-24-2014, 10:25 PM
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The mother of all 6.0 "crank no starts"

I know this is a big one for my first post, but I've got a good one here, that is running me in the ground. The truck is an 05' model, 6.0 Auto.

Oil pressure is 1500psi cranking.
Engine RPM 150.
FICM 48v.
Fuel pressure 65psi.
Ficm sync is good.
Compression is 300 on all cylinders.
Cmp, CKP sensors replaced.
ICP replaced.
FICMs swapped out.
PCM swaped out.
Reprogrammed.
Replaced 8 injectors.


I'm just out of ideas, or things to look at. Everything checks out good on the computer, its cranks and cranks, and rarely ever hits a lick. Does anyone has any thought or ideas? Any help would be greatly appreciated.
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Old 03-24-2014, 10:33 PM
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Cam sensor? tried the ICP unplugged? could be another bad though not likely. where are you checking fuel psi. hows the filters. you tried plugging it in? 1500 psi cranking seems much more than normal.... you said 2005 unless its a very late 04 there is no check ball valve in the hpop.... i also feel you need closer to 200+ while cranking though im unsure.

Last edited by MyTractorsSexy; 03-24-2014 at 10:37 PM.
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Old 03-24-2014, 10:41 PM
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Quote:
Originally Posted by MyTractorsSexy View Post
Cam sensor? tried the ICP unplugged? could be another bad though not likely. where are you checking fuel psi. hows the filters. you tried plugging it in? 1500 psi cranking seems much more than normal.... you said 2005 unless its a very late 04 there is no check ball valve in the hpop....
Thanks for the quick reply. Cam sensor has been replaced, and shows sync. Tried cranking with the ICP unplugged, with no change. Checked fuel pressure at the pump, and the bowl. It is a true 05' build engine, but that is a good thought. If you have any other thoughts, I'd love to hear them. I've lost a lot of sleep over this one. Again, thanks.
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Old 03-24-2014, 10:45 PM
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I just did a little google work and read from several people you need over 200 rpms for the engine to fire most said 250 rpms. maybe you have a weak starter. i did a short google on it maybe when you get time to an in depth search. also check all wires to ground. if you have a good jumper pack switch it to 24 volts. it may squeeze a few more rpms out of your starter.
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Old 03-24-2014, 11:16 PM
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Quote:
Originally Posted by MyTractorsSexy View Post
I just did a little google work and read from several people you need over 200 rpms for the engine to fire most said 250 rpms. maybe you have a weak starter. i did a short google on it maybe when you get time to an in depth search. also check all wires to ground. if you have a good jumper pack switch it to 24 volts. it may squeeze a few more rpms out of your starter.
I'll check, and get back to you. I've got the fords spec check list, and have been going through it, I'll double check RPM tomorrow.
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Old 03-28-2014, 03:30 PM
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Ever get her started?
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Old 04-01-2014, 12:08 PM
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Ever get her started?
Nope, sorry, I've been tied up with other jobs.

,Zac
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Old 04-01-2014, 12:53 PM
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we couldn't get my dads started one time and we realized the AC compressor was seized. May not be an engine issue might be something smaller. We didn't figure it out until we took the belt off and started fine without the resistance.
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Old 04-10-2014, 05:16 AM
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So, assuming you can read parameter data, Look and cranking RPM, and INJPW or Injector Pulse width. If you have more than 120 cranking RPM and 1ms of INJPW, the system is attempting to inject fuel and the engine should start. If this is not the case, you start working backwards to determine what you don't have. Since your post said that you have SYNC and FICM SYNC, do a little basic stuff first. Check ICP Key On Engine Off. You should see around .1 volts, If its more than that, unplug the ICP sensor and recheck. If its still more than that, verify that the ICP sense wire is not shorted to voltage, causing your biased reading. If all is well there, Perform and Injector Electrical self test, (buzz test) You should hear all eight injectors click in numerical order. If they do not, you either have a FICM issue, or the injector harness is not grounded.
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