Needing some help please.
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New User
Joined: Mar 2016
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From: Saluda, Virginia
Needing some help please.
Hello all, I am new to the forum. I am also new to the 7.3 powerstroke. I have a 1995 F350 crew cab dually. Only had her about 6 months. She was running like a champ...until we had our first snow. Had her plugged in. Had about 2 weeks of really bad weather. I couldn't get her to start. Acting like no fuel. I have changed, glow plugs, valve cover gaskets with new wire ends, fuel filter, icp(leaking), new orings on the ipr (the nut was in the valley). She started on her own but blew a fuel line. Ran really rough. Figured that was why. Not the problem. I have replaced all the fuel hoses around the fuel filter bowl, cleaned that out. Not getting any warning lights, my scanner doesn't work on this darn truck. Now, she will start on her own but rough idle, knocking, no power what so ever, floor the pedal and she only goes to 2000rmp., not overly smoking. Can anyone help guide me to what I might look at next? Thank you for looking at my post.
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From: Saluda, Virginia
Okay will do, thank you. I had my husband change the plugs and didnt think of checking them. I was gonna take the valve covers off and check the inside wiring and injectors. I sure hope it's that simple.
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New User
Joined: Mar 2016
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From: Saluda, Virginia
No oil #7 or #8
Okay plugs look good, took off the valve covers and tried to start the truck. HPOP was low on oil...is this suppose to stay full? because it's not. No oil in the valley. No real bad leaks externally. Topped it off and she started. Was gonna start injection test and found that no oil was coming from #7 and #8. Pressure to the others seems great. Smells like I have fuel in my oil and my has raised on my dip stick. Any thoughts?
Fleet Mechanic
Joined: Dec 2006
Posts: 1,925
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From: Phoenix, AZ
Okay plugs look good, took off the valve covers and tried to start the truck. HPOP was low on oil...is this suppose to stay full? because it's not. No oil in the valley. No real bad leaks externally. Topped it off and she started. Was gonna start injection test and found that no oil was coming from #7 and #8. Pressure to the others seems great. Smells like I have fuel in my oil and my has raised on my dip stick. Any thoughts?
Also, if you are getting fuel in the oil, I believe pretty much the main cause is that your injector O-rings are bad on one/all the injectors. I don't know how difficult it is to change the O-rings, but apparently it's not tremendously hard, you just have to make sure to get any oil/fuel OUT of the cylinders before starting the engine after changing them. I believe you do this by taking out the glow plugs and bump starting the engine or using a small hose to suck out everything through the glow plug hole/injector hole.
Anyways hopefully someone more knowledgeable will tell you where to look on HPOP draining issues.
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From: Saluda, Virginia
I'm still a knewb on these engines but here's what I know so far. The HPOP reservoir should stay full, so if it's draining there is something amiss with that.
Also, if you are getting fuel in the oil, I believe pretty much the main cause is that your injector O-rings are bad on one/all the injectors. I don't know how difficult it is to change the O-rings, but apparently it's not tremendously hard, you just have to make sure to get any oil/fuel OUT of the cylinders before starting the engine after changing them. I believe you do this by taking out the glow plugs and bump starting the engine or using a small hose to suck out everything through the glow plug hole/injector hole.
Anyways hopefully someone more knowledgeable will tell you where to look on HPOP draining issues.
Also, if you are getting fuel in the oil, I believe pretty much the main cause is that your injector O-rings are bad on one/all the injectors. I don't know how difficult it is to change the O-rings, but apparently it's not tremendously hard, you just have to make sure to get any oil/fuel OUT of the cylinders before starting the engine after changing them. I believe you do this by taking out the glow plugs and bump starting the engine or using a small hose to suck out everything through the glow plug hole/injector hole.
Anyways hopefully someone more knowledgeable will tell you where to look on HPOP draining issues.
Post Fiend
Joined: Dec 2009
Posts: 15,505
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From: Livoina,La
Hpop res should stay within 1/2"-1" from the bottom of the threads.
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
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Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
I'm still a knewb on these engines but here's what I know so far. The HPOP reservoir should stay full, so if it's draining there is something amiss with that.
Also, if you are getting fuel in the oil, I believe pretty much the main cause is that your injector O-rings are bad on one/all the injectors. I don't know how difficult it is to change the O-rings, but apparently it's not tremendously hard, you just have to make sure to get any oil/fuel OUT of the cylinders before starting the engine after changing them. I believe you do this by taking out the glow plugs and bump starting the engine or using a small hose to suck out everything through the glow plug hole/injector hole.
Anyways hopefully someone more knowledgeable will tell you where to look on HPOP draining issues.
Also, if you are getting fuel in the oil, I believe pretty much the main cause is that your injector O-rings are bad on one/all the injectors. I don't know how difficult it is to change the O-rings, but apparently it's not tremendously hard, you just have to make sure to get any oil/fuel OUT of the cylinders before starting the engine after changing them. I believe you do this by taking out the glow plugs and bump starting the engine or using a small hose to suck out everything through the glow plug hole/injector hole.
Anyways hopefully someone more knowledgeable will tell you where to look on HPOP draining issues.
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Fleet Mechanic
Joined: Dec 2006
Posts: 1,925
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From: Phoenix, AZ
When injector orings are bad/blown you would get oil in the fuel since the HPO psi is greater than the fuel psi. The same goes with cracked injector cups. You would get fuel in the coolant because the fuel psi is greater than coolant psi. The main sign of bad orings is the fuel filter would be black
The fuel pump seems weird to me on these engines. The pump shaft just rests against the cam lobe perpendicularly? It seemed weird when I had mine out and made me think I was doing something wrong bolting it back in, just aimlessly shoving the shaft down towards the cam. I could see though if that's worn then fuel will come out of that into the engine!
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New User
Joined: Mar 2016
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From: Saluda, Virginia
When injector orings are bad/blown you would get oil in the fuel since the HPO psi is greater than the fuel psi. The same goes with cracked injector cups. You would get fuel in the coolant because the fuel psi is greater than coolant psi. The main sign of bad orings is the fuel filter would be black
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New User
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From: Saluda, Virginia
Hpop res should stay within 1/2"-1" from the bottom of the threads.
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
Thank you for the info!
I don't see any fuel blowing out the bottom of the fuel pump. My fuel pump is on top behind the filter bowl. (do I have another one?) Since I changed all the fuel lines there are no external fuel leaks that I can see. Nothing in the valley now. Sorry if I am not understanding what you mean.
Last edited by Shay3171; Mar 23, 2016 at 10:05 PM. Reason: forgot to say something
Thread Starter
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New User
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From: Saluda, Virginia
Ah yeah I did read that and that makes more sense. Maybe I'll remember it this time now that I gave someone bad info!
The fuel pump seems weird to me on these engines. The pump shaft just rests against the cam lobe perpendicularly? It seemed weird when I had mine out and made me think I was doing something wrong bolting it back in, just aimlessly shoving the shaft down towards the cam. I could see though if that's worn then fuel will come out of that into the engine!
The fuel pump seems weird to me on these engines. The pump shaft just rests against the cam lobe perpendicularly? It seemed weird when I had mine out and made me think I was doing something wrong bolting it back in, just aimlessly shoving the shaft down towards the cam. I could see though if that's worn then fuel will come out of that into the engine!
I don't consider it bad info Bubba.
To me its learning. I know she is old but plan on having her for a very long time. Our vehicles seldom see a shop. We had an 86 E350 6.9 that had the mechanical fuel pump on the side of the engine. That thing baffled me, I was so worried I would install it wrong. Guess I got lucky because it worked.
Lets hope I can get lucky with this girl and get her back on the road! We have to pick up a colt on the 1st and spring turkey starts in 2 weeks so she needs to pull the camper!
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New User
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From: Saluda, Virginia
injectors out
Nasty! The injectors have gunk on them and look terrible with build up, o rings squashed. I am thinking nothing has ever been done with them. Okay advice please. ..I am wanting to rebuild them. Stay stock or go with stage one kit? They are AA from the research i have done. What would be the difference? Also does anyone know where I can find the darn orange rubes (all 3 of them) for the turbo and the gaskets for the HPOP reservoir? I also noticed that the screen from the fuel bowl to the FPR (I think that is what it is) is missing...is this a problem? The guy that had her before us didn't treat her real good. He also used synthetic oil. Thoughts on continuing to use it? Thank for ideas, suggestions, and the help!
Thread Starter
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New User
Joined: Mar 2016
Posts: 22
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From: Saluda, Virginia
Hpop res should stay within 1/2"-1" from the bottom of the threads.
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
If you're getting fuel in the oil then I'd say it blowing fuel out the bottom of the fuel pump.
Double check the oil coming fro 7 & 8. If they weren't firing you would definitely know it. It would have a bad miss and sound like a 70's bulldozer
Lead Driver
Joined: Oct 2003
Posts: 8,476
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From: Madison, WI
IIRC, Riff-Raff Diesel (Clay), major supporter of the various truck forums, has intake hoses. Oil choice is your call. I like synthetic because we often go a year or more between oil changes, and synth is more stable over time. Just use one that's rated for diesel, and NO additives (since, as you know, the injectors run hydraulically on the engine oil).