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Ray M.
Ray M., Ford Master Tech
Category: Ford
Satisfied Customers: 3018
Experience:  30+ years in trade, Ford Master Tech, Journeyman Automotive Tech
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2005 ford f250: 6.0 diesel..cranking..pressure at icp voltage

Customer Question

2005 ford f250 6.0 diesel 68k crank no start bought at auction dont no history scan truck memory codes p2285 ,p2291,p115a,. scan truck while cranking o pressure at icp voltage .28 dsd pressure 1270 ficm,volts 48.pulled icp out put shop air pressure to it values did change to shop pressure in scan tool is there a way to test irp,i did also try to put air pressure to icp hole to see if there is air leak in system not alot of luck here air leak, need to know what direction to go.
Submitted: 5 years ago.
Category: Ford
Expert:  Ray M. replied 5 years ago.
When you put air in the ICP port ,if it sounded like and air leak in the lower part of the engine then it is likely the fitting on th e high pressure pump,but since you have no ICP pressure at all when cranking,I would change the IPR as it is stuck open,if it were the fitting on the pump,it would build a small amount of pressure still.
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Customer: replied 5 years ago.
i work on truck a little today tapping o ipr and cranking with scan tool cranked got little pressure of15 pounds cranked again got 25pounds crank again got 32 pounds then let sit lose pressure to 3-4 pounds, then it would slowly build up then lose pressure start cranking it took a lot of cranking.
Expert:  Ray M. replied 5 years ago.
am afraid that sounds like a high pressure pump fitting failure.
Customer: replied 5 years ago.
you think coupler connection went out
Expert:  Ray M. replied 5 years ago.
Yes,this is a common and known problem with the 2005,2006 6.0l engines.

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