Are you running an oem oil filter? also what oil are you running?

 

Yes, motorcraft filter, motorcraft 15w40 oil

 

Is it an OEM oil filter cap??

 

Yes, OEM oil filter cap. Are you guys suggesting oil drain back? Even if the oil filter did drain out, wouldn't the HPOP sump still be full of oil? It holds about 3 quarts or so....

 

yes your right

it would make more sense that the HPO is bleeding off

But really Need some Gauges to nail some Numbers down

 

Last week I brought a fitting from work I thought would work. I removed the ICP sensor and found out my fitting was wrong, M14 instead of M12. I found the fitting I needed and did a pressure test of the high pressure oil system. Much to my suprise when I was attaching my test equipment, it seemed like most of the oil drained out of the rail, when I removed it, it seemed "full" of oil. I cranked over the engine and it took about 10 to 12 seconds of cranking before I got a pressure reading, once it reached about 1000 psi it started running, but was surging between 900 and 1200 rpm. The pressure was also surging from 1000 to 1500 psi and slowing evened out to 1500 psi and held. I increased engine speed and the pressure went up to 2000 psi. I gave it a quick rev and pressure went past 3000. At idle, pressure held around 1500. When I shut it off, the pressure bled down to 0 quickly. I left it sit a few hours and started it again. Again, pressure slow to build, took about 5 seconds to reach about 1000 psi and started runnning. I removed the test equipment and reinstalled the ICP. It apprears to me that I have oil leaking off in the high pressure system, where I don't know. Looks like the next step should be an air test. What do you all think?
Thanks!

 

With a 2006 might as well Bite the bullet and go for the dummey plugs stand pipes that would probably fix it
But you might go 1 step further and do the STC fitting and be done with all the HPO problemsthat seem to Haunt the 05+ models

 

I appreciate the insight. Would it be worth the effort to do an air pressure test? I guess all you would do is pull the valve covers, install an air fitting to the ICP port, and command the IPR valve 100% and listen. Is there any other way the oil could be bleeding back? Also, if I would continue to drive the truck, it is possible that the small leak could turn into a large leak and leave me stuck on the side of the road? Something to look forward too? Hopefully this also explains my intermitten running issues. On another note, it looks like my head gaskets are starting to leak. I was pulling my boat to put it away for the winter and the truck was working harder than it usually does and I noticed some puking going on....great.
Thanks!

 

Bump for air test? Comments?

 

it couldent hurt, I agree with blade though only because I have read about a ton of the later model hpo leaks being dummy plugs and stand pipes. So I would replace them either way if you have to open her up. So Yea air test it if you feel up to it but replace the dummy plugs and stand pipes anyway if shes open goodluck

 

I forgot to mention, before I bought the truck I called the dealer who sold it new and got some repair history that was done under warranty. At 88K they replaced the STC fitting. At 98K they installed new dummy plugs, one or two, I don't know. The truck is a 2006, so the work was probably done in 2008 or late 2007? I bought the truck in Janurary of 2010. When was the last time the dummy plugs and STC fitting were updated? I'm wondering if its just the standpipes now. I guess you would be foolish to just replace the standpipes and not the dummy plugs. I would like to continue to drive the truck since its winter now, but I don't want the truck to leave me sit aside the road with 8 inches of snow on the ground.
Thanks!

 

If you have the capability to do the air test, I don't think that is a bad idea. It may reveal the problem, or it may not. But it will eliminate some possibilities and get you closer to the issue, perhaps.. I had the HPOP STC fitting issue on my truck. It tends to be a problem starting the truck when it is has been driven, is warmed up, shut off and then a restart is tried. Or when the engine is warm, your driving, and suddenly the engine shuts off.

I am still learning the engine myself, but if I understand some of the HPOP issues they seem to be "warmed up engine" related, initially anyway. When I had my STC fitting done, the "Updated" kit was used. Not sure when the update was, but the repair was completed August of this year.

I noticed that you are using 15w40 oil. Not that 15w40 isn't a good oil, but many of us have switched to 5w40. I use Rotella T6 5w40 year round. The injectors are able to move it more easily and there for does provide smoother starts.


Eric

 

Thats pretty cool you found out about your truck a little investigation paid off for shure!!

I would go for the stand pipes and the dummey plugs since you dont know if both sides were changed or not

I know the STC fitting can blow out and leave you stranded but you shouldnt have to worrey about that as long as you got an updated part Bismic would know the time line on the Update of the STC fitting

your symtoms shure point to a dummey plug or standpipe leaking those would be the usual Culprites But you should also check the orings in the injector Tops it could also Bleed HPO there

I think that you would be having Hot No Starts if you hada Bad STC fitting and or maynot run at ALL

replace the standpipes and dummey plugs you can run the truck with the valve covers off so run it and let it sit the amount of time that would be consistent with when the problems Arise [the Longer Crank times] and then try again to start to see if the issue got resolved

 

I'm going to pick up a dummy plug and standpipe kit Friday and hopefully get a good start on installing them on Monday. I wonder what the flat rate is??? I'll start from there and see how it runs, try running it with the valve cover off and see what kind of mess I can make....As far as the orings in the injector tops, you can't replace them right? Not a servicable part? I don't really understand that, I guess they want to sell injectors...
Thanks!

 

yes they have kits that include the orings for injector tops

Im not shure where there getting them though