LPOP or IPR

[tempuser]

So ive been a member of this org for like four or five years and i got locked out, try to reset my password and i never get any emails from the org. If an mods wanna help that would be great.

Any how i bought a 96 F-superduty 5 speed 97k the other day.
The last two times ive started it, it will start right up in the cold and fun for 5 seconds and die. The it will start right back up, except for this last time. Wolnt start back up at all. Took thw fuel bowl out and rebuilt it. I replaced the harness the feeds the ipr wif sensor fuel heater it was chewed up...ect. still nothing. Lift pump pushes 45-55psi. So i checked the hpop and it was empty.

So is it the lpop or the ipr?

It was not a gradual loss of power, just lights out.

Thanks for the help

[tempuser]

Im looking to buy AE software. I haven't been able scan the truck with my scanner. I also unplugged the icp and nothing.

[cadejackson]

after cranking it for a few do you see oil pressure on your dash gauge?
if not then i would think your low pressure oil pump is not working..

[tempuser]

Pretty sure that gauge is an idiot gauge. On or off. But ill check.

My crank cases oil level went up when this all happened. Thats what makes me think its a bad ipr. Worth rebuilding? Or buy New one?

How do I check it with a volt meter, I forgot how.

Thanks

[BigFuel]

Also pull the plug off the HPOP sump and look in after it dies. Is the oil level within a 1/2" of the plug? Yes, not the LPOP. No, probably is the LPOP.

[tempuser]

Its empty. How can i check the low pressure oil? Where is the sensors that feeds the idiot gauge in my dash? I could get a 100 psi gauge for that i guess.

What about the ipr? It can let the oil in the hpop sump drain back to the oil pan if it goes bad right? Maybe it got some trash in the valve?

This thing is gonna be had to start once it is fixed because i have air in the oil and fuel system

[BigFuel]

You are correct that the gauge is not more then an "idiot light". The sending unit is the sender just to the left (as you re looking at the motor from the grill) and when it sees 5+ psi it collapses and turns off the light and pushes up the needle. With the truck started, starved of oil and the HPOP sump drained, pour more oil into the sump (it'll take 1/2-3/4 Qt) and try starting again. If the truck starts, quickly bring it up to 1500RPMs and see if the LPOP comes back.

Go under the truck on the left side (drivers) and behind the steering tire and locate the oil filter. Look above the filter at the filter mount. About half way up the mount you will see two ports. The port on the left is the over pressure port that dumps oil back into the oil pan. To add a working oil gauge to the truck use the port on the right. This port is just post the filter so it is "clean" but before anything else in the engine.

[tempuser]

Thanks for the diagram.

Any chance you know what size that port is?


Sounds kinda odd for the oil pump to go out in spurts like that. Or is that how they go. Only has 97k miles...??

[BigFuel]

Sorry, I realize this is hard to read. As stated by Ford the LPOP is out of spec when the face (where it rubs against the front cover) is out of spec at .004".

[BigFuel]

Sorry about my first post, guess I needed to read your first post better. The plug on the oil filter adapter is likely a 1/4" port plug and you need a allen to remove it. There are a few other things that would lead to the low pressure side of the oil system to read nil. Just hope that it is your LPOP. For sh*ts and giggles, what year is the motor if you look around the oil filter for the manufacture stamp?