help! truck just up and died. - Diesel Forum

ALASKA96 · 08-10-2009, 09:21 PM

i was driving and my truck just quit on me. it cranks but wont fire, there was a code for the injection pressure low while cranking but i forgot to write it down. and when i crank it it takes a long time to build oil pressure. any idea whats causing it?

ALASKA96 · 08-10-2009, 09:30 PM

oh, and i hooked the laptop up and even after the gauge started reading oil pressure the icp was still reading 0 and the ipr duty cycle jumped up to eighty something percent but would just not build any high pressure. i took the valve covers off and everything looks hooked up, i thought one of the hoses from the standpipes may have blown off but they look ok.

speedrcr78 · 08-10-2009, 09:36 PM

Is your ICP in the valve cover or in the back of the engine? I know the ones that are not in the valve cover can get contaminated with oil and fail causing the issue that you have. But I am far from an expert hopefully someone else will chime in with some other suggestions.

ALASKA96 · 08-10-2009, 09:45 PM

its on the back but it was changed about 30000 miles ago for leaking, its not currently leaking

Texascadillac42 · 08-10-2009, 09:52 PM

When you say "it takes a long time to build oil pressure", are you talking about the Low pressure system, or the high pressure system?

Are you using aftermarket or Motorcraft oil filters?

ALASKA96 · 08-10-2009, 09:54 PM

the low pressure system takes forever to read on the gauge, and the icp sensor reads 0psi. i only use motorcraft filters.

Texascadillac42 · 08-10-2009, 10:17 PM

Mechanical gauge will tell the story on the low pressure side. Have you pulled the oil filter out, pushed the black drain valve down with a screwdriver while having someone crank the motor? It should fill the housing with oil very quickly. If it does fill, assume the LPO system is ok and start looking for a massive leak in the HPO system. (Since you have already pulled the valve covers, I would take the HPOP cover off next) If it does not fill the oil filter housing, you have a LPO system problem. The first things to check there would be the oil pressure relief valve, and then the oil pump itself.

ALASKA96 · 08-10-2009, 10:26 PM

and i just did head gaskets last week. but i didnt have any of the pump, ipr or ipc removed. do the pumps just up and go on these trucks? would a blown o-ring on the standpipe cause the pressure to read 0? i took off from a light and turned left and it just died without any warning.

Texascadillac42 · 08-10-2009, 10:49 PM

The 04 pumps have a check ball (relief valve) in the side of them. It is just a press fit, nothing more that holds it in. The 04 truck I have worked on several times had all the same symptoms you describe, and it turned out that this "check ball" popped out. Truck ran great one day, and the next day it was dead. New HPOP from International and the truck was back on the road.

On edit, here is a picture of where the check ball is located on the 04 6.0 HPOP....

Texascadillac42 · 08-10-2009, 10:51 PM

Did you use new o-rings on the stand pipes?

ALASKA96 · 08-10-2009, 10:55 PM

the standpipes are new, the old ones twisted when i removed them to pull the heads.

Texascadillac42 · 08-10-2009, 10:59 PM

I see, the o-rings on the stand pipes seem to be a pretty robust piece of rubber, unless you really worked at it, I think they are probably fine. And I dont know if a busted o-ring could cause a big enough leak to affect LPO psi. That check ball is roughly 1/2" in diameter. A 1/2" hole in the side of the HPOP will cause ALOT of oil to be pushed out of the pump without going to the heads.

ALASKA96 · 08-10-2009, 11:05 PM

thats what i thought, an o-ring might cause it to run a little off but i would think it should still start. is that ball a common problem? i was thinking it was something i had apart that went wrong, but ive been running it for a week without a single problem until now. i dont know much about these trucks i had a 7.3 for 5 years but this thing is a totally different animal.

Texascadillac42 · 08-10-2009, 11:09 PM

The guy at International told me he has seen several 2004 model year VT365 and PSD 6.0L trucks have this problem. The newer style HPOPs do not have this "check ball".

ALASKA96 · 08-10-2009, 11:12 PM

ok, thanks. i guess tomorrow i will pull the turbo off and take that cover off and take a look at the check ball.