This one will be a little tougher

[blacksnapon]

05 6.0, No start. Quit going down the road. IDS shows no ICP pressure. Has Aftermarket oil filter and cap (still no ICP after change). Do air testing, air leak noted at rear of engine. Cycle IPR with IDS during air testing, no change in sound. Likely cause(s)?

 

[F 150Cobra]

bad low pressure oil pump or bad HPOP

 

[blacksnapon]

bad low pressure oil pump or bad HPOP

NOPE!!!!!!!!!!!!!!!!!!

 

[BIGRED911]

6.0? Lol..I Meen that's most of it...

 

[blacksnapon]

6.0? Lol..I Meen that's most of it...

DONT BE A SMARTY BUTT! NOPE!

 

[BIGRED911]

Ya oughta know by now I always pick on the 6.0...mainly to get Toddly fired up...air leak at rear of engine eh?

 

[lil_dq]

For the stupids on here could you expand out the ICP's XYZ's and the ABC's to dumb it down a little?

 

[BIGRED911]

I think the ICP is injector control pressure sensor....?

 

[BIGRED911]

Any oil leaks?

 

[blacksnapon]

ICP-injector control pressure (tells how much pressure for injector usage, needs min 500 psi just to start). IPR- Injector pressure regulator (regulates the high pressure engine oil {ICP}) At idle will be 14.2%, wide open at 89-95%

 

[blacksnapon]

Any oil leaks?

NONE!!!!!!!!

 

[BIGRED911]

If there's an air leak but no oil leak ....no oil in the hpo system?

 

[blacksnapon]

If there's an air leak but no oil leak ....no oil in the hpo system?

the air leak is internal

 

[SuperCab]

Check the tire pressure in all 4 tires AND the spare

 

[blacksnapon]

clue: the noise doesn't change when you cycle the IPR

 

[fatherdoug]

Check the tire pressure in all 4 tires AND the spare

 

[BIGRED911]

Cracked line?

 

[blacksnapon]

Cracked line?

nope!!!!!!!!!!!!!!!!!!!

 

[BIGRED911]

One more clue? Is it leaking before the ipr?

 

[blacksnapon]

One more clue? Is it leaking before the ipr?

The high pressure oil goes through the pump first, then the IPR opens or closes to regulate the pressure. Open, the oil goes past the IPR and out of the "bleed hole" in the pump. Closed, the pressure doesn't reach the hole. The IPR is bad, never closing. Thus the "air leak".