Hello all I recently baught a 99 f250 6 speed and has been driveing fine for the last 2 weeks until now it started running really ruff about 3 days ago then yestarday the oil pressure gauge went to nothing and light came on. I pulled over and got it towed home truck was running horribly right before the light came on and gauge went to nothing. I checked the oil and it was full but black, I went to look at the service sticker on the windshield and the oil hasnt been changed in about 20k miles.... talked to a friend of mine explained everything and he told me it could possibly be the high pressure oil pump has gone out or the oil pickup in the pan is clogged... I called ford they said they wont know until i bring it to them to look at for $200 i know that the high pressure pump would be easier to change than the oil pickup and i have no way to pull the motor at my house for the pickup... and Im just wondering if anyone may have had the same problem or might know what the problem is?? any help would be highly appreciative. Also if it is the high pressure pump do any of yall have a diagram on where it is located im mechanically smart but have never worked on one of these before. thanks in advance.

 

If the oil is black like you said and hasn't been changed in 20,000 miles,you need to start there.Oil is what runs the injectors,I woud change the oil before anything else is looked at.Of course thats just my.02 worth...Oh...sorry...Welcome to FTE..

 

thanks and I planned on changeing the oil but didnt want to waist $60 in oil wasnt sure if that would just make it work figured if something was clogged up it would stay clogged up am I right?? or should i try to change it and see if that'll work on its own

 

I doubt very much that an oil change is going to fix your problem. You said your oil pressure gauge went to 0 and a light came on ,was it still running or did you shut it off ? With out a good bypass oil filter system 5000 miles or so should be your max miles on an oil change 20,000 is way way too many miles................

 

I understand your concern about not wanting to spend $$ on an oil change that won't solve the problem. But I think we could get things fixed for you here, without paying the dealer to diagnose it. $200 for Ford to try and diagnose it is money that can be spent on possible repairs.

My thoughts, I would change the oil and filters (even fuel filter) and make sure the HPOP oil level is where it's suppose to be. See if you can get it to run again.
Where are you located? There may be someone close by with an AE, help give you some insight to what is going on. Even when cranking, it'll give you the ICP pressure to see if it's building any pressure.

 

i live in bush Louisiana and i dont know where the hpop is or how to check it.. just changed the fuel filter about 1k miles ago so i was told and it does look brand new i also think that a few injectors are bad but there almost $300 a piece and they can wait but how do i check the hpop

 

If the low pressure oil pump went out then the HPOP reservoir will not fill and the injectors will not fire and truck will not start.

Here's a pic of the HPOP reservoir. Remove the plug and use something as a dipstick to check oil level in reservoir. If it is empty that may mean the LPOP is not working and the reason the oil pressure guage is not registering. Oil pressure sensor is on the HPOP reservoir.



The plug takes a 3/16ths allen wrench.

 

ok will check asap but truck does run it just runns horrible!!! also there is oil in the valley between the heads... if i do need to replace my hpop how the hell does it come off im sitting up on my motor trying to figure it out and im just not seeing what i need to i guess ive tryed to search and havent found much if you have a diagram please let me see it lol thanks ill go check my fluids now

 

Changing oil now is not a waste unless the engine is toast. If it needs to be dropped for later repairs, there is nothing wrong with saveing it in clean containers. I do agree that it most likely will not fix your problem.

The HPOP is located right below your fuel filter. I would check to see that it has oil. The resevor for the HPOP is in front of the fuel filter toward the fan. Remove the engine cover. In the top there will be a sensor in the passenger side and an allen plug in the driverside. Remove the allen plug to check the oil level. I should be no more that an inch from the top. My bet is that it is way low. That oil is supplied by the LPOP (low pressure oil pump). If it is indeed low you need to find out why (remember you oil light coming on). My guess is the oil pickup in the pan is cracked, broken, or plugged.

Robin beat me to it.

 

this my friend is what im hopeing is not the problem because from what i understand you have to pull the motor to change the pickup... and i have no experiance with PSD and not a lot of money... called ford earlier they said to change the pickup would cost over $3k... if thats the case i might as well just put a new motor in her and call it a day... also said to change the HPOP would cost a total of around $1400 I know there is oil in the valley between the heads... so i can only figure the hpop has been leaking and it looks like it has been for a while now... im waiting on a friend to get here ive seemed to have lost my allen wrenchs and im going to check it out i cant tell where the oil is coming from but there is a lot of build up and some fresh oil in the valley. does anyone have a diagram on how to remove the HPOP??

 

Try this link for directions http://www.dieselsite.com/pdffiles/a...structions.pdf

 

At least drain the oil and have a look at it. There's a chance that the oil was changed by the previous owner since the last time it visited one of those quick lube places.

I wouldn't be in any hurry to change your HPOP just yet. Let's try and diagnose your problem before you start changing parts. 1st off we know you probably need to change your oil. You also said you've got oil in the valley, but you mentioned your oil level was full. How big of a leak do you have, and how is the oil still full?

My truck will burn a quart of oil or so in 5,000 miles with no leak. 20,000 miles and oil in the valley means your oil should be low. Park on level ground, wipe the dipstick, and check the oil level again. Then shine a flashlight down in the valley and see if you can tell us where the oil seems to be coming from. Most likely it's a bad o-ring on the HPOP or HPO lines, or maybe the turbo pedestal. A leak in the high pressure oil system can cause your truck to run rough, but that's usually after you've lost a couple of gallons of oil.

 

What Chris said. Get it properly diagnosed before you start throwing parts and money at it.

 

i had a problem with oil between my heads and it turned out to be the o ring on my hpop line.itwas leaking and made a big mess on the top of the motor.thats my 2 cents and i hope you find the problem.this forum has helped me a lot and i know these juys will help you find whats wrong with your truck too.

 

thanks to everyone so far havent had a chance to work on it yet... the guy i baught it from said the truck would leak about a quart or so every week or 2 i had drained all the oil out the truck to do an oil change the day it broke down the oil was horribly black i just havent put the new oil back into the system yet due to not sure of the problem. I also have a 2006 6.0 diesel parts truck is there any change that the HPOP off of that truck will work on this truck if so that would be a free part no money spent and i could change the HPOP out and that would help diagnose the problem correct?? but not sure if it will work i head it will but yall know a lot more about these trucks than I do. and while I got yall on here is there any way to bold up the 06 6.0 auto tranny to my 7.3?? just wondering because the 6 speed in the truck grinds 2nd and 3rd badly. i doubt it could but iff possible im sure i would have to buy an automatic flywheel and maybe a bell houseing and a trans cooler? just wondering