Oil pressure issue
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
re
My second problem for the day is my oil pressure at start up. A little history, I had a problem with the HPOP resevoir draining overnight. So I would have several no start mornings where I had to pull the HPOP plug and manually fill the tank. I had the injector o-rings replaced, and it helped tremendously. Never a no start morning since. BUT, even though the system is holding enough pressure to start up in the morning, the guage will show no pressure for about 5 seconds or so, and if I don't rev it a little until I get the guage to read something, it will die, and potentially not restart without the manual filling of the tank. Any ideas?
Thread Starter
|
Laughing Gas
Joined: Jan 2005
Posts: 920
Likes: 7
From: Mazon, IL
I haven't had to fill the resevoir manually for a while, just after it fires up first thing, if I don't rev it up right away, it will die. Then I have to crank it a bit to get it to go. Then it acts like there's air in the system ie. chugs and smokes. Trust me I would much rather not have to pull the motor, I'll see what happens tomorrow in the AM.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
If somone made a pre-oiler for the 7.3 that would work for you.
I bought a '78 Saab turbo in about '82. The guy I bought it from installed a pre-oiler - turbo saver. Turn on the key and a pump would bring the oil pressure up to about 35 psi in just seconds and then I would turn the key to start. When the key was turned off the pump would run for about three minutes oiling the turbo bearings. It would sure be nice to have something like that for the 7.3.
Edit : On the Saab the pre-oiler mounted to the spin on oil filter fitting and then the oil filter fit on the pre-oiler.
I bought a '78 Saab turbo in about '82. The guy I bought it from installed a pre-oiler - turbo saver. Turn on the key and a pump would bring the oil pressure up to about 35 psi in just seconds and then I would turn the key to start. When the key was turned off the pump would run for about three minutes oiling the turbo bearings. It would sure be nice to have something like that for the 7.3.
Edit : On the Saab the pre-oiler mounted to the spin on oil filter fitting and then the oil filter fit on the pre-oiler.
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
I recall once on my mustang the oil gauge would not register and would run very rough at start and then die. It turned out to be the oil pressure sensor. I think it was going into the fail safe mode and shutting down.
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
This thread sounds similar to your problem: https://www.ford-trucks.com/forums/8...e-at-idle.html
Don't know if it helps as he ended up replacing the motor, I guess.
Don't know if it helps as he ended up replacing the motor, I guess.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Unfortunately, I believe that his pressure sensor is functioning properly. His engine wouldn't stutter and die out due to an empty HPOP reservoir if it were getting plenty of oil, but the sensor wasn't registering.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I haven't had to fill the resevoir manually for a while, just after it fires up first thing, if I don't rev it up right away, it will die. Then I have to crank it a bit to get it to go. Then it acts like there's air in the system ie. chugs and smokes. Trust me I would much rather not have to pull the motor, I'll see what happens tomorrow in the AM.
Thread Starter
|
Laughing Gas
Joined: Jan 2005
Posts: 920
Likes: 7
From: Mazon, IL
So if it's a cooling jet, I'm still pulling the motor. Here's my main issue. Money. Work has sucked, and I'm about tapped. I realize that pulling the motor is basically cost free, but what kind of price tag am I going to have to replace the pump and the pickup tube? I checked the level of the HPOP reservoir yesterday before the first start. I stuck a 2" stick in and the bottom 1" had oil on it. I still have the extra 2 qts of oil in it also. At startup, counted 1. 2. 3. and had pressure. No hesitation at all. I'm going to drain the pan back to normal today, and check it the same way in the morning. And no one has chimed in with an opinion about, is it worth the hassel at 226k? Like I said, there's no way I can afford to go through the whole engine.
Thread Starter
|
Laughing Gas
Joined: Jan 2005
Posts: 920
Likes: 7
From: Mazon, IL
One more thing that just caught my brain. I replaced the HPOp about a year ago. The problem started the same way, but I found the leak and problem was solved. When I replaced the HPOP, I lost the plug for the reservoir, so I found a bolt that fit and grabbed an o-ring from one of the oil plugs in my glovebox (from the oil crossover install) and have been using that as the plug ever since. There is a little seepage around the plug. That couldn't cause the level to drop could it?
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
If that plug has a leak it is going to be harder for the LPOP to build up the pressure.That is a special bolt and don't think I would use one you had laying around. It sounds like you are getting different results about the reservoir draining down? There should be check valves in the system after the LPOP. I also saw there is a oil regulator somewhere by the oil cooler or oil filter. Had a hard time finding much info on it though. It's kind of hard for anybody to give you advice on just running it. I'm pretty sure it would shorten the life of the engine by the symptoms you describe. You can get a lot of miles out of these engines if properly maintained.
Thread
Thread Starter
Forum
Replies
Last Post
FUJINAMI1293
1999 - 2003 7.3L Power Stroke Diesel
18
May 4, 2013 08:10 PM
f150-351
1999 - 2016 Super Duty
3
Dec 6, 2012 09:33 AM
sferg
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
3
Jan 11, 2005 04:09 AM