DPFS melted...
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From: Indiana
DPFS melted...
99 5.4
While doing the plugs and coils, I found the source of the other code- my DPFS is wasted. The hoses going to it are blown apart, and the body of the DPFS itself is melted pretty badly.
Any idea what might have caused this?
I have it off the truck right now, but is it safe to start and/or drive without it being connected?
While doing the plugs and coils, I found the source of the other code- my DPFS is wasted. The hoses going to it are blown apart, and the body of the DPFS itself is melted pretty badly.
Any idea what might have caused this?
I have it off the truck right now, but is it safe to start and/or drive without it being connected?
Mountain Pass
Joined: Dec 2006
Posts: 196
Likes: 1
From: INYOKERN, CALIFORNIA
Melted.
It sounds like you may have a restriction in your exhaust system. If you want to drive it remember you are directing exhaust into your engine compartment, and it could possibly enter the cab thru the cowl vent intake. Good luck!
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From: Indiana
Well, I've had the code since I've had the truck, so the DPFE has been wasted for that long. I don't know why I never noticed it. I haven't noticed any exhaust coming in- not much is going to go through those two rubber hoses.
I know that sounds like I answered my own question on driving it, but- the old wasted one was plugged in when I was driving it, now it is unplugged and removed from the truck. I didn't know if it mattered that it was unplugged.
I know my exhaust is fine- I went through it shortly after I got the truck. HOWEVER- the cat and muffler were removed by the PO before I bought it (which is why I did the exhaust- it was friggin' loud). Maybe he removed stuff because it was restricted...
Either way, there had to be a crap-load of heat going through the EGR tube, then through the hoses to melt the DPFS. I would have thought the rubber hoses would have melted before the sensor itself.
I know that sounds like I answered my own question on driving it, but- the old wasted one was plugged in when I was driving it, now it is unplugged and removed from the truck. I didn't know if it mattered that it was unplugged.
I know my exhaust is fine- I went through it shortly after I got the truck. HOWEVER- the cat and muffler were removed by the PO before I bought it (which is why I did the exhaust- it was friggin' loud). Maybe he removed stuff because it was restricted...
Either way, there had to be a crap-load of heat going through the EGR tube, then through the hoses to melt the DPFS. I would have thought the rubber hoses would have melted before the sensor itself.
Mountain Pass
Joined: Dec 2006
Posts: 196
Likes: 1
From: INYOKERN, CALIFORNIA
Hoses
Just a tip for you, when you replace the DPFE , use the correct size orange silicone hose, it is a bit more expensive than the regular stuff, but will handle the hear better. I think you are correct in your reasoning that the PO had a Cat issue and that caused the carnage. Enjoy your SuperDuty!! Dale
Mountain Pass
Joined: Dec 2006
Posts: 196
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From: INYOKERN, CALIFORNIA
What do you have for an exhaust system now? I have a Cat and a Flowmaster on my 1996 F350 with a 7.5 , and it sounds good, not too loud, but enough noise that other vehicles know I am around. Take care! Dale
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Thanks Dale - looks like a straight pipe (4in) from front to back. Has at least one exhaust gas temp sensor.
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From: Indiana
I got a little confused about the muffler question up there... DPF is different than DPFS.
Anyway, I don't know if sharing a link to a different forum is allowed (if not, feel free to delete this), but here is a really good writeup on Ford emissions systems, including the DPFS...
EGR, EVAP, PCV, ECT, 02's, TPS, IAT - Ford F150 Forum - Community of Ford Truck Fans
After DALEDIESEL mentioned a restricted exhaust, it was the info and diagrams here (along with the PO's removal of the cat and muffler) that leads me to believe the cat and/or muffler was clogged, thus sending excessive heat up the EGR tube, and onto the DPFS hoses. It is really the only thing that makes sense.
Anyway, I don't know if sharing a link to a different forum is allowed (if not, feel free to delete this), but here is a really good writeup on Ford emissions systems, including the DPFS...
EGR, EVAP, PCV, ECT, 02's, TPS, IAT - Ford F150 Forum - Community of Ford Truck Fans
After DALEDIESEL mentioned a restricted exhaust, it was the info and diagrams here (along with the PO's removal of the cat and muffler) that leads me to believe the cat and/or muffler was clogged, thus sending excessive heat up the EGR tube, and onto the DPFS hoses. It is really the only thing that makes sense.
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From: Indiana
Well, I've had it almost two years, I have no idea why it has taken me this long to notice the melted DPFS- and she's had a few oil changes BY ME. No excuse, really. I probably had put it out of mind because of the code for the coils.
I really can't complain about this truck, nor the engine- the guy I got it off of did NO maintenance, and stuffed worn out big tires under it. The first thing I did when I bought it a couple years ago was replace all the wearable parts for the front end and the front brakes. Put a muffler on it too, because it was just too loud. And now, at a touch over 250,000 miles, new ignition coils and DPFS. That's really not a bad track record for a truck that still runs great and uses/burns ZERO oil.
I always said that when this engine lets go, I'm gonna stuff a Cummins in it. But with this motor, I might be in my 90's before it happens...
I really can't complain about this truck, nor the engine- the guy I got it off of did NO maintenance, and stuffed worn out big tires under it. The first thing I did when I bought it a couple years ago was replace all the wearable parts for the front end and the front brakes. Put a muffler on it too, because it was just too loud. And now, at a touch over 250,000 miles, new ignition coils and DPFS. That's really not a bad track record for a truck that still runs great and uses/burns ZERO oil.
I always said that when this engine lets go, I'm gonna stuff a Cummins in it. But with this motor, I might be in my 90's before it happens...
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