Have you checked the level of the HPOP? should be near the top. You need an allen wrench to take the bolt off. could keep it from starting until it refills back up. Maybe its draining while it sits for awhile.

 

kAWIKA, I have no ideal what a hpop is. where is it located and what purpose does it serve? and if it not full how do I fix it? Sorry guys but this is my first diesel

 

The HPOP housing is the rectangular aluminum box that is mounted in the vee right above the water pump. If you remove the "Powerstroke" cover you will find the HPOP (High Pressure Oil Pump) mounted on the back side of it right between the housing and the fuel filter canister.
Judging on where you live, you don't need glow plugs to get the engine started, even if you let the truck sit for three days. Especially if it's only sat for two hours and it's hard to start again. Your starting problem is something else, but what it is I am not sure.
The list of possibilities include, worn out valve cover wiring to the injectors or the plug has come loose inside.
With your fuel pickup having a hole in it it could be letting a TON of air into the fuel stream and the fuel pump needs some time to clear out all the air bubbles that are in the fuel rails. This is a VERY common problem and is easily fixed with the proper mods and the results can be dramatic.
A cracked engine oil pickup tube that is airating the lube oil before it gets to the HPOP and it needs some time to compress the air bubbles in the HPOP rail.
A crack in the soldering for the IDM (Injector Driver Module) that is closing enough to run good after you start it. (This one seems very unlikely to me.)

Any other ideas, guys?

 

<TABLE cellSpacing=1 cellPadding=3 width=436 border=1><TBODY><TR><TD vAlign=bottom width="10%">Item



</TD><TD vAlign=bottom width="24%">Part Number



</TD><TD vAlign=bottom width="65%">Description



</TD></TR><TR><TD vAlign=center width="10%">1


</TD><TD vAlign=center width="24%">9278


</TD><TD vAlign=center width="65%">Oil Pressure Sensor


</TD></TR><TR><TD vAlign=center width="10%">2


</TD><TD vAlign=center width="24%">6600


</TD><TD vAlign=center width="65%">High-Pressure Oil Pump


</TD></TR><TR><TD vAlign=center width="10%">3


</TD><TD vAlign=center width="24%">6049


</TD><TD vAlign=center width="65%">Cylinder Head


</TD></TR><TR><TD vAlign=center width="10%">4


</TD><TD vAlign=center width="24%">9A332


</TD><TD vAlign=center width="65%">High-Pressure Oil Feed Hoses


</TD></TR><TR><TD vAlign=center width="10%">5


</TD><TD vAlign=center width="24%">—


</TD><TD vAlign=center width="65%">High-Pressure Oil Rail

(Part of 6049)

</TD></TR><TR><TD vAlign=center width="10%">6


</TD><TD vAlign=center width="24%">—


</TD><TD vAlign=center width="65%">Injector Oil Feed Galleries

(Part of 6049)

</TD></TR><TR><TD vAlign=center width="10%">7


</TD><TD vAlign=center width="24%">9F593


</TD><TD vAlign=center width="65%">Fuel Injectors (8 Req'd)


</TD></TR><TR><TD vAlign=center width="10%">8


</TD><TD vAlign=center width="24%">9F838


</TD><TD vAlign=center width="65%">Oil Pressure Sensor


</TD></TR><TR><TD vAlign=center width="10%">9


</TD><TD vAlign=center width="24%">7A139


</TD><TD vAlign=center width="65%">Oil Pressure Regulator


</TD></TR><TR><TD vAlign=center width="10%">10


</TD><TD vAlign=center width="24%">6019


</TD><TD vAlign=center width="65%">Engine Front Cover


</TD></TR><TR><TD vAlign=center width="10%">11


</TD><TD vAlign=center width="24%">6658


</TD><TD vAlign=center width="65%">High-Pressure Oil Pump Reservoir


</TD></TR></TBODY></TABLE>

During initial start or cold start, the high-pressure oil pump (6600) receives unfiltered oil from the left side valve lifter oil gallery through the anti-drain back check ball valve. Once the engine starts or during warm engine starts, the check ball closes and the high-pressure oil pump receives filtered oil from the high-pressure oil pump reservoir. The high-pressure oil pump pumps the oil under extremely high pressures 4,115-20,577 kPa (600-3,000 psi) through the left and right side high-pressure supply hoses to the high-pressure oil rails (integral to the cylinder heads). Once in the oil rail, the oil is fed to the fuel injector bores through four oil feed galleries drilled and machined in the cylinder head. The high-pressure oil then actuates the fuel injectors.

On top of the HPOP Oil Reservoir is an allen bolt that you can remove to see how far the oil is from the top. Should be less than an inch from the top I believe.


Dave

 

One of the best ways to be able to diagnose a running problem is to understand how the engine is designed in the first place. That gives you a good foundation to be able to think about the symptoms, and based on what you know, have a good idea on where to start.
This is a good little write up that briefly explains how the injectors work.

http://www.intellidog.com/dieselmann/injector.htm

.

 

wow, thanks. check the oil level its about half a inch from the top. the guy that works at the ford dealership, said he check the gears first on front of the motor. I assume its the one on the hpop, then he said something about orings on the injectors. Can you pull the injector out and clean them up? I think my best bet would find a diagnostic comp. I don't mind doing the work, its the trouble shooting, but I'm learning. Kwikkordead, I lived in the yakima valley in the late 80's earily 90's.Loved the mountains,hated the valley. every time I went to seattle it was raining.

 

Kwikkordead, thats a Great article on the injectors, whole new understanding on tying together the fuel, oil and what air can do. Also, the importance of changing your oil regularly.

 

He's probably thinking about the clearance between the CPS and the timing gear. There have been cases mentioned here on FTE where the timing gear would strike the head of the CPS because it was too close and the solution was to shim it out a few thousants of an inch, (I think).
Yes you can clean the injectors, but I recommend that you buy new o-rings for the ones that you pull. Make sure that you clear out the cylinders before you reinstall them or you will hydro-lock the engine. The easiest way to do that is to remove the glow plug and crank the engine by hand first and then using the starter after that. Don't just crank it over with the starter and a cylinder full of oil, the oil will shoot out of the glow plug hole as hard as a pressure washer! You stand a good chance of damaging the engine because of the hydraulic shock and at the very least having a bunch of oil to clean up.
As far as the Seattle rain, it doesn't rain 24/7 up here, so you must have missed the good days.

 

Kwik, is there a place to put a presure gage on the HPOP to see if he is leaking down?

 

If you follow the high pressure hoses from the HPOP to the head you can see a bulge where the HPOP rail is. There is more than one access point for a hose to be attached and the unused ones are plugged with a dummy plug. Remove one of the plugs and make an adapter. You need at least a 4000 lb guage.

 

well, the problem getting worse.it went from not starting after hour or so to 15 mins. now it want start at all.this has happen over a few days. when I'm trying to start it the rpm gauge is moving so the cps is working? I'm going to rig up a pressure gauge. anybody know what fitting I need to get to screw on the fuel rail? or does anybody have a match I can borrow? Thanks

 

Would that be the right place to go? Or would you chase the fuel pump at this point?

 

how much pressure does the fuel pump puts out? When you turn the key on does the pump build pressure then shut off? mine just keeps running.

 

I think you just found it, I dont have a book in front of me for the presure, nor where to hook up with the presure gage, but I think I would replace the pump with what you said there, because yeah, it should reach presure, shut down, re engage to maintain presure.

 

Possibly your fuel pump, it should shut down after 20 seconds or so if not started. Have you tried to open your fuel bowl drain while the fuel pump is running to see if there is fuel? You should see diesel come out at a good rate until the pump shuts off. If there is not fuel and the pump is still running, its either a pump, clogged hose, or out of diesel.