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Yet another no start without ether 6.0 engine

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Old Jul 12, 2012 | 03:20 PM
  #1  
trqjnky's Avatar
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Yet another no start without ether 6.0 engine

heres what the scanner reads... truck will start with ether and runs fine...

rpm- 170 while cranking
ficmlpwer- 11.5V
FICMMPWR-48V
FICM SYNC-YES
FICMVPWR-11.5

IPR-15% KOEO, 85% CRANKING

ICP
ICP_DSD 1080 PSI
ICP_PRS 338 PSI CRANKING <------MY PROBLEM
ICP V- .61


AM i just looking at a bad icp valve?
 
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Old Jul 12, 2012 | 04:04 PM
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Unplug ICP and see what happens.

Keep using starting fluid and you'll be replacing the whole motor in no time
 
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Old Jul 12, 2012 | 04:10 PM
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Try what powerstroke90 suggest. If that don't work your probably gonna need to start looking for a HPO leak would be my guess.
 
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Old Jul 12, 2012 | 04:24 PM
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if im correct, the icp sensor is on the front pass side valve cover correct? i unplugged it.


where should i start looking for the high pressure oil leaks at? snap to connect fitting at hpop? which is under the turbo at the back of the engine?
 
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Old Jul 12, 2012 | 04:25 PM
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You unplugged it and it goes to 1000psi? Does it start?

Yes. It is on the pass side front of the valve cover it has 3 wires going into it
 
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Old Jul 12, 2012 | 04:28 PM
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Originally Posted by 2006powerstroke90
Keep using starting fluid and you'll be replacing the whole motor in no time
I only learned about the runaway diesel phenomenon recently ... quite amazing. Science and mechanics just never ceases to amaze and be fascinating. Simple but deadly.

Diesel engine runaway - Wikipedia, the free encyclopedia

UPS Truck almost blows up! - YouTube
 
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Old Jul 12, 2012 | 04:37 PM
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Originally Posted by 2006powerstroke90
You unplugged it and it goes to 1000psi? Does it start?

Yes. It is on the pass side front of the valve cover it has 3 wires going into it
yest it went to 1000 psi, and no it did not start.
 
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Old Jul 12, 2012 | 05:00 PM
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Originally Posted by Piolet
I only learned about the runaway diesel phenomenon recently ... quite amazing. Science and mechanics just never ceases to amaze and be fascinating. Simple but deadly.
couple things can cause that in a 6.0, and the only way to
really stop it is covering the intake.

i've read high crankcase levels can cause oil to get sucked into
the turbo.

my diesel mechanic says he's had 6.0's fill up the intercooler
with a gallon of engine oil.... and then the right combination of
engine speed and slosh gets the oil vapor/liquid into the intake.
the vapor will run away, and liquid.... well, we know what liquid
in the cylinders does, don't we?

tinky, tinky, BANG.

drat... you got me surfing UTube.... :-/

there are no shortage of diesel fans out there...
detroit diesel 24V-71, with... well, count the blowers....

http://www.youtube.com/watch?v=m48vy...eature=related
 
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Old Jul 12, 2012 | 05:28 PM
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so, with the sensor reading 1000 psi and still not starting while unplugged. i assume im looking for a high pressure oil leak, likely by the quick connect fitting?
 
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Old Jul 12, 2012 | 06:25 PM
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trqjnky without knowing what year your truck is its imposible to tell you anything . You may not even have a STC fitting . A leak could be in a few places from pump to O rings on it to injectors O rings .
 
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Old Jul 12, 2012 | 06:43 PM
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trust me on this, you tube does not do justice to a runaway diesel. I had a few of them over the years in my stall. shut down a freeway once from smoke. had the fire dept called. yes sir fun times.
do not ever try to stop one by plugging the intake, odds are it will suck down what ever is close to it.
the CORRECT way is a Co2 extinguisher.
 
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Old Jul 12, 2012 | 06:48 PM
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OP has an '05. I'd guess standpipes/dummy plugs, since it's building ICP into the 300s.
 
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Old Jul 12, 2012 | 06:56 PM
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Yup, by unplugging the ICP you verified the the 338psi your ScanGauge was reading. It will take 500psi to start. The 85% IPR while cranking is what you want to see also. The IPR is normally open and is commanded closed. It's a pain to get to behind/under the turbo on drivers side but I would pull it and inspect the screen.
https://www.ford-trucks.com/forums/8...condition.html
After item #26 in this thread is info on checking the HPO system for leaks.
 

Last edited by Rusty Axlerod; Jul 12, 2012 at 08:07 PM. Reason: Wrong acronym
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Old Jul 12, 2012 | 07:02 PM
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just went thru this ...again......with the 3rd truck, this one was IPR. last one was a dummy plug and first was bad injector orings on the 2 just replaced by a local mechanic.
 
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Old Jul 12, 2012 | 10:37 PM
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If it's a no-start HOT or COLD engine due to low ICP psi, odds are it's your IPR valve that has failed.
 
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