816wingnut

Hi, New member here and I have a 2015 XLT 3.5 (not eco) that I bought in Oct. Since I have owned it it has died while driving and fires right back up in a split second. I loose every bit of power. It has done this 6 times since owning. I took it to a dealer today and they found nothing and said it was fine. Anybody here or know of this problem? Need to get fixed before it kills someone. Thanks for any help.

gentryo3

Not sure if this is the same issue but I have a 2011 fx2 5.0 and had a problem with mine dying while driving too. So when I brought it in to the dealer they told me there were no codes showing up and they couldn't duplicate the problem when they drove it. So I decided to video it to show them, well this time When I videoed it, it wouldn't start back up like it usually would. So I had it towed in and they called and told me fuse 27 for the fuel pump relay power was burnt. They had to install a fuse relocation kit. No problems since

816wingnut

Thanks, that's a start. Sounds just like what I have. Going to keep driving until it does die I guess. Funny it doesn't throw a code for a hard start or stop? You would think it would.

Loflyin

My 2015 3.5 Eco just started doing the same. It can sometimes set for a couple - three weeks without being started.
First time it happened a few weeks ago I wasn't towing. Then this week hooked up the RV to get it inspected for registration. In about 8 mi. it cut out about 10 times. Kept running but very rough with max of about 1100 rpm, no power. Engine check light would be on, and message "Hill Start Assist Not Available." Pull over, stop, shut it off, and restart. And it would run fine for the next 100 - 200 yards. Next day after unhooking trailer, it runs fine with no check light on.

I didn't find this on my first search of the Forum.
If you want a whole lot of better information on this problem, go to this part of the F150 Forum - it's discouraging:
https://www.f150forum.com/f118/servi...339851/index7/