Aaargh, Please Help Again
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Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
However, it happens faster now. The first time, it started in St. Louis, but I made it to Chicago on the highway seemingly OK, but died when I got off on the sideroads. Second time, it got worse faster, I was limping real quick and barely got it to the shop. Today, once it started on the highway, it died within a few miles and wouldn't go further. The symptoms are always the same, they just seem to be getting bad faster once they start.
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Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
New suggestion that may make sense:
While watching the last mechanic put the injectors in yesterday, I noticed that he didn't torque anything, especially the injectors. Talking to the first mechanic, he says that could very much be what's wrong - one or more are leaking. He says that is the best explanation for why it would have broke so quickly today - i.e. the other possible causes wouldn't burn up injectors in 200 miles (assuming these newest ones are the problem since the symptoms are the same).
I'm also wondering if its the problem with the nipple cup o-rings that are described in our forums tech section. I mentioned that to the last mechanic and he didn't even know there were o-rings in there.
While watching the last mechanic put the injectors in yesterday, I noticed that he didn't torque anything, especially the injectors. Talking to the first mechanic, he says that could very much be what's wrong - one or more are leaking. He says that is the best explanation for why it would have broke so quickly today - i.e. the other possible causes wouldn't burn up injectors in 200 miles (assuming these newest ones are the problem since the symptoms are the same).
I'm also wondering if its the problem with the nipple cup o-rings that are described in our forums tech section. I mentioned that to the last mechanic and he didn't even know there were o-rings in there.
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Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
Yeah, I think so too. At minimum, I need to check/replace the fuel filters. The problem is that I don't have the tools to do the test, and the Ford dealer is closed until Tuesday so I can't get new filters. I'm thinking of driving back up there (had to leave my truck in Huntsville) Monday, removing the fuel filters just to see if they are obviously clogged. I could either buy aftermarket ones to use temporarily or blow out the existing ones to restore them to working condition long enough to rule them out as the problem.
Not sure if they can be cleaned like that.
Not sure if they can be cleaned like that.
Junior User
Joined: Aug 2014
Posts: 62
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From: Batavia, IA
How many miles are on the truck? Depending on torque spec tightening them by hand may be tighter than the spec. On john Deere engines the spec is not very high like a few foot pounds depending on engine. I have over 170000 on my 6.0 with no major issues ( knock on wood). I have heard hoop issues several times. What mods have been done?
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
It's got 130k. Only mod I know of is EGR delete. I got it with 122K. I think they are only torqued to 26-32 fp.
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Elder User
Joined: Apr 2013
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From: Bothell, WA
More information for you. I came across this thread: https://www.ford-trucks.com/forums/1...sperately.html a couple of days ago. Ended up being a bad High Pressure Oil Pump. Not to say that your pump is bad, but if you have a high pressure oil leak at the injectors, I imagine it could behave much the same.
If the mechanic was not aware that there are O-rings on the injectors, that could be a big problem.
If the mechanic was not aware that there are O-rings on the injectors, that could be a big problem.
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
I may have said that wrong - the mechanic didn't know about the o-rings on the nipple cups, if I'm saying that right. The ones described here: https://www.ford-trucks.com/forums/1...ole-story.html
Not sure why, but the first mechanic is the one who informed me that my truck already had the EGR delete and, he thought, an upgraded oil pump. Not sure why he thought the oil pump had been replaced.
Not sure why, but the first mechanic is the one who informed me that my truck already had the EGR delete and, he thought, an upgraded oil pump. Not sure why he thought the oil pump had been replaced.
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
Reading up on the HPOP, I'm understanding that Ford upgraded those by '06 and the new design eliminated most of those problems. How can you test it? After spending more than $3000 so far and solving nothing, I'm out of money to be just throwing new parts at the problem. I really need to diagnose this correctly.
Dang, I have such a good mechanic for my gas cars. Wish I had one for this diesel. Good and honest are hard to come by.
Dang, I have such a good mechanic for my gas cars. Wish I had one for this diesel. Good and honest are hard to come by.
Elder User
Joined: Apr 2013
Posts: 941
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From: Bothell, WA
My post was to illustrate that it is possible that it's not so much the injector, but could be a High pressure oil issue. Not the pump, but maybe a bad O-ring. Hopefully some of the more qualified posters will chime in here.
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
you may be right. maybe that nipple o-ring.
Junior User
Joined: Aug 2014
Posts: 62
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From: Batavia, IA
When I had my head studs done I did egr delete and replaced the oil cooler because I knew they had issues with them when egr coolers failed. I wouldn't think much about an oring causing a random issue like it is. You would probably have more hard starting issues along with more issues of rough running. This is just the john Deere mechanic in me though
Thread Starter
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Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
When I had my head studs done I did egr delete and replaced the oil cooler because I knew they had issues with them when egr coolers failed. I wouldn't think much about an oring causing a random issue like it is. You would probably have more hard starting issues along with more issues of rough running. This is just the john Deere mechanic in me though