05 6.0 long start hot or cold help

scott1984 · December 12, 2011

got an 05 F450 6.0 with an long start does it cold or hot temp doesnt matter. Air tested at hot and cold no leaks found with ipr grounded at the pcm. Once icp is bulit runs great. pull hpop cover off for the hell of it to see if the stc was leaking and its not but did crank over until started and let it set and the "bleed off" hole just keeps running oil. I feel like the hpop has and internal leak any suggestions would be helpful

BrunoWilimek · December 12, 2011

Remove oil filter from housing. Air pressure as before. If oil/air bubbles out of filter housing HPOP is faulty.

scott1984 · December 12, 2011

tried and no bubbles in oil filter housing

Bruce Amacker · December 13, 2011

got an 05 F450 6.0 with an long start does it cold or hot temp doesnt matter. Air tested at hot and cold no leaks found with ipr grounded at the pcm. Once icp is bulit runs great. pull hpop cover off for the hell of it to see if the stc was leaking and its not but did crank over until started and let it set and the "bleed off" hole just keeps running oil. I feel like the hpop has and internal leak any suggestions would be helpful

Let's clarify- by "bleed off hole" you mean the vent hole near the gear keeps leaking after the engine is shut off, right?

It's supposed to. The default for the IPR is zero, in which case it's completely open with the key off. This means it's going to vent or leak oil with the key off.

Let's start with some basics- what scan tool are you using? Have you monitored Sync and FICM Sync in scan data to see if they flip right away cranking? What is your IPR% at a hot idle? It should be right close to 23%. What DTCs do you have? Have you check fuel quality and pressure? What is your cranking RPM both hot and cold? It should be 215 hot and 175+ cold. If it is low it will suffer from extended crank.

How long did you leave the IPR closed with air applied during your HP test? A small leak may take a half hour to push the oil out and hiss.

Give us some answers and we'll suggest a direction.

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lmorris · December 14, 2011

Last one we had that did this was a broken oil filter stand pipe along with an AFTERMARKET oil filter cap with a stock oil filter in it.

scott1984 · December 14, 2011

Yes thats the hole i am talking about. A snap on scan tool ipr is @ 85% while cranking 23% hot idle. No i havent check for cranking rpm and it syncs right after you try to start it. about 25 to 30 mins on the air test

scott1984 · December 14, 2011

ok i forgot this during the air with the ipr Grounded at the pcm koeo should any air being coming from the vent hole

Brad Clayton · December 14, 2011

Just a bit off topic, actually alot of topic but I noticed the truck in your avitar seems to be

starving for fuel.....might want to get that looked at. Posted Image

lmorris · December 14, 2011

ok i forgot this during the air with the ipr Grounded at the pcm koeo should any air being coming from the vent hole

You should not hear any air leaks with IPR maxed. On another note if you are grounding the IPR instead of using a scan tool to manipulate it, you can accidentally burn out the IPR. Short 2 minute max. groundings are recommended. I would be replacing the IPR at this point and retesting.

You have not mentioned checking dummy plugs. They can leak down while the engine is shut off and not show up on an air leak test. Check them also.

scott1984 · December 14, 2011

thanks i got a new ipr i ll try i had the the truck runinng with the valve covers off did see any leaks but i pull the out to be sure and brad it actually was runinng out of fuel

jimmy57 · December 15, 2011

I thought the truck in avatar was just clearing out from a stuck EGR valve.

lmorris · December 15, 2011

it actually was runinng out of fuel

If you think about it, every internal combustion engine that is running is technically running out of fuel. That thing looks like it uses fuel faster than you could put it in.

scott1984 · December 16, 2011

ok back to the powerstroke removed hpop check for seals looked good spin the engine oververf. that oil was getting to the pump. I decide to replace hpop and it starts every time even after a cold soak and running for 3 hours

Keith Browning · December 16, 2011

ok back to the powerstroke removed hpop check for seals looked good spin the engine oververf. that oil was getting to the pump. I decide to replace hpop and it starts every time even after a cold soak and running for 3 hours

Glad to hear you got it! Posted Image