99 & up 7.3L Power Stroke Engine and DrivetrainDiscussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
Hey guys I have a 2001 Ford F250 crew cab. It has 230,000 miles on it. I just rebuilt the motor. Got the motor to start after filling the oil tank a few times. Backed it out of the garage and let it run for about 5 min. Decided to shut it down and check the fluids. Went to restart it about 15 min later and it wouldnt start. I filled the oil tank again and still nothing, repeated this about 5-6 times. Everytime I cranked it over I checked the level in the oil tank it was empty. I thought maybe it was the LPOP not working right so I got a new one this morning and tried it. Still the same thing happening, it will fire and run for about 0 seconds and die. I am new to the Fourm but have always loved diesels and owened 2 within the past 2 years. Any help would be greatly appreciated guys!
Pull the plug on the reservoir and install a pressure gauge in the #4 ORB hole. See if you are maintaining pressure there or not. A cold engine will be able to hold 25-45 psi, a warm engine should be more than 15 psi there.
My guess is you have something wrong, maybe the IPR is stuck open and causing the pump to dump the oil. You may try diagnostic observations while starting. You should watch ICP and IPR duty cycle to see what it is doing.
__________________
Ken
2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....
ok thank you very much. I will check that in the morning. I know it holds oil when the motor is not being turned over. Will i have any preasure while cranking the motor over? I cant get it running long enough to check the oil preasure. The gauge stays at 0!
Did you get the oil pump pickup tube installed correctly? If it's leaking air, then the LPOP can't pick up the oil. If everything else checks out OK, then put a few more quarts in the oil pan, jack the rear wheels about 3' off the ground and try again. That will submerge the entire pickup tube in oil and keep it from sucking air if that's the problem.
You could also use a port on the filter housing to precharge and pressurize the oil system from an external source.
I would refrain from running the engine until you are positive you have oil circulating through the LPOP. The engine won't last long before bearings spin and all kinds of bad things happen.
The oil filter assembly might be a good spot to start. There are bypass valves in there that may/may not be the cause of your issues. Perhaps one of the other guys can elaborate if it's a possibility
__________________ Tom
99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
Well guys i jacked up the rearend and still nothing. Cleaned up the semsor can wire conections with no luck that way eith. I installed a new LPOP yesturday and when I had it off I noticed some scratches on the fron engine cover. They were about 1/16 of an inch or more. My dad says replacing the front cover might help with the oil pump. I can have one delivered to my door for $70 on Friday morning. Do you guys think this is the problem or not? Just looking for some feedback guys!
Yes I filled the filter, crnk case and iol tank before I started it. Everytime I crank the motor over the tank drains into the crank case. So sense I have been trying to start it I have added about 8 qts. to the crank case. I haved filled the tank and let it sit for 2 hrs and it remained full. I am at a lose here guys!
What you are calling the oil tank is a reservoir (tank). Not to insult your knowledge but I just want to clarify what it does. It gets oil from the LPOP and it supplies the HPOP with the oil it needs. The oil then returns to the crankcase to be recirculated.
This is a new rebuild right? If so, the oil galleries in te head are full of air and are probably leading to our problems. If you fill them with oil via the head plugs, you may be able to keep it running. Disconnect the ICP sensor and see if she will start and run.
Have you verified pressure at the reservoir? If you have, then I would lean towards a stuck open IPR. If not, then it is a LPOP or oil supply issue.
__________________
Ken
2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....
It appears the reservoir isn't draining back into the crankcase, it's being used firing the injectors. It really sounds like there is NO oil pressure.
I'm guessing that if you leave the plug out of the top of the hpop reservoir that nothing happens when you run the engine. Normally, oil would come out.
That's the nice thing about these engines. If you don't have oil pressure, the hpop reservoir won't fill and the injectors cannot be fired. That keeps the engine from suffering damage from no oil.
You are filling the reservoir and allowing the injectors to be fired without knowing if the rest of the engine has any oil. This could be particularly bad on a new rebuild, as you are operating on assembly lube only, and that is only good for a minute while initially starting the engine.
__________________ Tom
99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
Ken thanks for the sponse. Yes I am aware that the tank is called the oil reservoir. Yes this is a new rebuild, I understand that it takes a while to get the oil to fill the heads and injectors. By taking one of the head plugs out can i verify how much oil is in each head and how much to add to it? I filled the tank yesterday and tried to start it with the ICP unhooked and still nothing. I also replaced the LPOP 2 days ago and still no luck. What kind of oil preasure am i to be getting from the reservoir while cranking? When it does star it sound like it is really muffled like there is no power. Also what does the IPR do and will it cause the reservoir not to fill will oil?
Ton the reservoir stays full when i am not trying to stat it. I understand your concern with only running on assembly lube. It bothers me also. Yesterday I did try to start the truck with the plug out of the reservoir and no oil came out!
You should be seeing a good 40psi on oil pressure.
The IPR is a solenoid that throttles oil from the hp oil pump to achieve the desired pressure the PCM is looking for. It is normally open, not allowing pressure to build, and the pcm will cycle it closed, which is read in duty cycle. The higher the duty cycle, the harder the ipr is working to get to the required pressure.
If your truck is running after you fill the reservoir, the ipr is working and the heads have oil in them. It might be aerated oil, but there is oil.
__________________ Tom
99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
Yesterday I did try to start the truck with the plug out of the reservoir and no oil came out!
That indicates that the LPOP isn't putting out enough pressure to lift the oil to the level of the reservoir. It should come shooting out of there like a geyser normally. The LPOP puts out enough volume that it shouldn't have any trouble at all getting oil into the reservoir.
So either your pickup tube in the crankcase isn't even hooked up or there's a serious hole in the oil system somewhere between the LPOP and the reservoir. Here's a diagram of the low pressure oil system. If you left off the piston cooling jets, of didn't have a lifter installed, then oil would leak out of the system. The quick fill check ball (items 3, 4, 5, & 6) are in a direct line from the LPOP outlet to the HPOP reservoir and supply oil to the reservoir until the pressure in the block oil galleries equalizes and the spring closes the valve.
Another possiblity is there's something obstructing the inlet to the HPOP reservoir (gasket not cut correctly?)
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