Need some help guys. I bought my first diesel 6 months ago and haven't had any problems with it til now and not sure if I have a major or minor problem. It is a F350 with about 125K miles on it. I was pulling a horse trailer this weekend down the Interstate and the PSD was beggin at 60 mph. Total trailer weight with the horses couldn't have been more than 6000#. Just as soon as I hit an incline the truck would start blowing black smoke and bog down to around 55-60 mph. On the flats it would run 70 without belching smoke but that shouldn't be happening. Could not get it to go faster than 70 unless I was going down a hill. I was running with several other Fords with 7.3's and 6.0 and they had to wait on me. I'm glad there were no "bow ties" in the pack. I just had the fuel filter changed 3000 miles ago when I had the oil changed. I popped the hood and I did not see anything unusual nor did it idle funny. I will say that when I was pushing up an incline the engine seemed to have a "ping" to it but when I pulled over and checked it, it did not do that again. The engined still did not want to carry the trailer faster than 60-65 on the Interstate. I have a KN filter and the Superchip with stock pipes. Any suggestions other than taking to a diesel mechanic?

 

Check all of the boots on the Y-pipe and intercooler lines to make sure one has not totally or partially slipped off causing you to loose most or all of your turbo boost pressure.

 

U running with some gauges to monitor things while towing...very important!
Sounds like possible intercooler boot leaks...see any oil around intercooler
rubber boots? Need to monitor boost PSI.

 

I do not have any gauges at this time but have thought about adding them. I'm mechanical but do not have any experience working on engines though. Adding gauges...is this difficult or should I get my mechanic to do this. They don't specialize in diesels although he owns one and does know a little about them. I do trust them though which is not easy to say about some of the services I have done before at other establishments. Regarding the Y pipe, I think that is right on top when I open the engine...correct? If so, I did check that and from the top pipe, it seemed to on securley without any leaks. Not sure if there is a bottom pipe that requires viewing from the bottom but we did check to see of the pipe to the turbo slipped off ( that was suggested by some of the other PSD drivers in my group). Nothing seemed out of the ordinary to them though and they certainly were more more familar with PSD's than I am.

 

Need some boost figures. Do u have your wastegate disconnected(remove red line to actuator solenoid)?

 

what benefit is the wastegate disconnection and how is it done right???

2000 f-350 drw 7.3l man trans

 

Will give u more boost. Just disconnect the red line that attaches to the waste gate acuator and plug it on the end of some small bolt.

 

I'm going to take it to a Diesel Mechanic since I just don't know enough about engines. This guy indicated to me that he thought the Super Chip I put in caused more problems than there worth. He actually suggested I reset it back to the factory settings, put it behind the driver's side rear wheels and back over it. I chuckled but wondered if I should run from this guy or not. He came recommended from someone I trust but I know alot of people have this Mod done. He stated that he thought it might be the turbo or a hose/pipe leak somewhere but obviously couldn't verify that til he looks at it. With the factory pre-sets back in, now I stuggle to maintain 60 mph going up an incline under no load. I think this is sounding more and more like a major deal. I can see the $$$$ signs adding up already. Ouch! After I get his diagnosis, I hope you guys can help me evaluate his repair suggestions to be sure I'm be told the real issues I'm dealing with. Thanks again for all the comments.

 

Have you checked for any DTCs? Your condition sounds almost exactly like
what I had been experiencing recently, except that mine occurred even w/o
the trailer. What I found was that the feed tube for the EBP sensor was
totally clogged with carbon. Since the sensor wasn't seeing any change in pressure, it was keeping the EBPV closed all the time. Took the sensor off,
ramrodded the tube (started the truck with the sensor still off to blow any crud back out the tube - don't want it going through the turbo), cleaned out the
sensor, and put it back together. Man, what a difference. I'd look into that real quick before you shell out any money or assume that you have a major problem. If it is the culprit, you might consider just leaving the electrical connector unplugged - assuming, of course, you live in a mild climate.

 

444 - Can you tell me where the EPB sensor is located because that sounds pretty easy to check. Certainly don't want to shell out $$ for a simple solution.

 

Will this trick harm anything? Too many LBS of boost?
Were is this located? I love "More Power" (voice of Tim the tool man)LOL

 

Got some DTC's if someone can help with what they are.


DTC# 01 - P1248
DTC# 02 - P0603

 

P0603 is a Keep-Alive Memory voltage fault. Have the batteries been disconnected recently? It's a common problem on these trucks. To clear the code, run the truck for more than 30 seconds. Clear the DTC, then recheck.

P1248 is Turbo Boost Pressure Not Detected. Pretty self explanatory. Like Guzzle said before, check all of your intake connections, especially at the intercooler. If all the connections look good, then you might have a bum turbo.

And because you asked, the EBP sensor is mounted on the front top of the engine. If you stand in front of the grille, the EBP is mounted just to the left of the engine centerline, behind and just above the idler pulley next to the A/C compressor. There is a single, three-wire electrical connector on it. It has a pencil-sized steel tube exiting from the bottom that wraps down under the A/C and into the r/s exhaust manifold. If you disconnect that connector, the EBPV will default to the open position.

 

so what r u plugging after you disconnect sensor??? will it give you anything on the idiot lights!!!!!

 

444 - I did just replace the batteries within the last month. I think I have to remove both DTC's at the same time or will the Superchip Turner allow me to delete them individually since I have two?

Regarding the EBP sensor. If I remove the connector and start the truck will that mean the turbo would default to running or would never run? Just wondering if I could do that to check and see if in fact the EBP sensor was bad or not.