I have 2013 f250 6.7. I was towing my camper to beach last week. 15 miles into trip I lose power, truck would only do about 50 with only about 5-8psi of boost. This is the 2nd time this has happened.. No check engine light.... Turn truck off for few mins start back and within 2 miles it does it again... What's my problem? Truck runs fine when I'm towing anything

 

Check the CAC composite tube. It might have a leak. It goes from the inter cooler to the throttle body. It is all composite material. Many on here have replaced the CAC (cold air tube) with aftermarket tube. I used the Rudy's Diesel version.

 

We have checked the tube.. It looks to be fine.. No cracks.

 

This sounds to me like it is going into limp mode. Have you scanned it for codes?

 

Check engine l in g is not coming on... I've had scanned twice.... Nothing is coming up..

 

This is what my '13 was doing. Have you noticed that the left bank of the engine "rattles" just a little bit more than the right side when this is occurring?? No engine light would come on on mine either. Mine only cleared once by turning it off, but the tech and I believe FORScan can clear it up by clearing the "Specified Functions" in the PCM. The power returns immediately. If it keeps doing this, there is a TSB out, so I'm told, about removing the left head and replacing the valves. Supposedly this is brought on by a regen that doesn't clear completely. After all the trouble I had with mine, it hasn't had any trouble since the delete. It was getting to where I couldn't trust my truck to tow the camper 50 miles without doing it, and the next step was the head being worked on. The only problem was that I was leaving for a three week vacation and no time to do it, so it was either delete or trade it. The delete was going to be cheaper than the divorce, so that was chosen. I've never wanted high HP tunes and stuff like that, but if Ford couldn't get it fixed, the delete time had come. Not a problem since.

 

What did you go with for the delete?

 

I used Patriot nGage with the FloPro stainless pipe and a blank connector kit from Shibby Engineering.

 

thanks...10 charactors

 

How many miles and do you daily drive your truck? With my plugged EGR at 105k or so, daily driving was ok (must have been driving it easy) but I didn't discover the issue until towing my tractor where I could hardly hit 50 in third with the accelerator to the floor up a grade. This was two or three weeks after replacing the #5 injector. To this point, no CEL but there was the P0401 flagged when I checked. I suspect it was this way for some time before the code was eventually flagged without driver notification.
The issue was noticeable with hard acceleration. Plenty of power in gears 1-2 but would derate once in third (very obvious loss of power) without the torque converter locked. Unlike my failure with the DEF heater assembly, clearing the codes for the EGR was only a few minute fix and it would flag and derate again. With the DEF issue, I could clear the codes and be fine for the duration of that drive until engine restart (reset and repeat).

For my CAC duct, I don't think I noticed the cracks on both ends under the removable clamps until after I removed it to inspect. I just could hear the air leaking and no codes. I had only lost a few PSI but it all made sense why the truck was only producing 18 PSI for a while instead of 21 PSI.

A bit of a ramble but just attempting to throw some experience your way since you don't have a code yet.