no start...325 psi hpo

[suprdzlduty]

need some help guys, I have 07 that I did a delete, cooler, and high pressure pump and ipr on, when cranking it will only build 320 to 325 of hpo. I have plenty of low pressure oil. I have pressure tested the system and found a few very small leaks...relace the standpipes and rail plugs, now I cannot hear anything. no leaks. that at about 120 psi of shop air. do i need to test the system at a higher pressure?? in the past that has been more than enough air to show the leak. On the scanner desired icp is 1500 or so. Is there something im missing??

 

[fordfreak4life]

What's the icp n ipr readings

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[suprdzlduty]

icp reads 320 to 325, ipr duty cylce is 80%

 

[POWER-STRUCK]

you could get the tools and dead head the pump and check one bank at a time. is the pump new or used?

 

[fordfreak4life]

New stc fitting? Did u over torque something n warp it?

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[Powerstrokeracing]

Put in a new oil cooler? I've had a couple IPR act up after that (something went through screen)

 

[Stroker#66]

How did you pressure test the system? I usually go threw the icp port with 90psi shop air and you will hear leaks untill you feed the ipr 12v. If you still hear air after that you have a leak

 

[suprdzlduty]

new pump from Ford...they have the new fitting installed already. who make the tools to isolate the banks? Are they through Rotunda/Ford or can you make them yourself? can a spool valve be blown out or stuck wide open and cause oil to pass or air and possibly not hear it while testing?

 

[suprdzlduty]

How did you pressure test the system? I usually go threw the icp port with 90psi shop air and you will hear leaks untill you feed the ipr 12v. If you still hear air after that you have a leak

yes, like that except I use about 120 psi. Thats what my regulator is set at.

 

[suprdzlduty]

tested the system again this morning, while the shop was really quiet and when i put 12v to the ipr i can hear a little squeak of air for about 5 seconds then it stops...and for the next 15 seconds there is not a sound. how many branch tubes have you guys seen fail?

 

[POWER-STRUCK]

if you had a leak large enough to lose that much oil you would be able to hear it! did you listen thru the oil cap? i usually do these tests with the covers off. if you do not find an obvious leak look elsewhere such as cranking rpm or poss. bad pump

 

[suprdzlduty]

if you had a leak large enough to lose that much oil you would be able to hear it! did you listen thru the oil cap? i usually do these tests with the covers off. if you do not find an obvious leak look elsewhere such as cranking rpm or poss. bad pump

Thats what I thought too! no, I had the valve covers off.

 

[POWER-STRUCK]

it will take a few moments of air pressure to push the oil out to be able to hear an air leak

 

[Lassie]

The hpop will make 300 psi even if the IPR is commanded or stuck open. Just because the IPR is showing 80% DC, that doesnt prove its working. Check the IPR connection or the screen.

 

[suprdzlduty]

update, after testing this morning, truck fired up and ran like a watch...for about 20 seconds...now I have all kinds of hpo but restart. I may be chasing some electric gremlin now...:cursing:

 

[DSTRYER]

I hate gremlins...

 

[suprdzlduty]

just a little update on this truck...it was something in the pcm that caused the issue. I don't know what exactly yet but i put another one in the truck and it fired right up. hope all this will help someone in the future.