I've been having a stalling issue with my 2018 F150 STX since it was brand new. I have the 2.7L Ecoboost and now have almost $25k miles on it, and pretty much every time I tow with it, after running a couple hundred miles, when I stop for gas and come to a full stop, it stalls. Then I have to rev up the RPMs for a minute to keep it running before I can move. It doesn't give any warning or check engine lights. The only message it gives is "Auto StartStop, Manual Restart Required" or Auto StartStop, Shift to P, then Restart Engine". I've tried restarting it from Park and from Neutral, I've tried manually disabling the Auto StartStop before it happens and while it's happening.

I looked at other posts on here briefly and did see others comment about stalling issues, and there were comments about sensors, but with mine it ONLY every happens when towing. I'm going to take it in to a dealer and have them check it out, but without any warning lights, and the fact that it only happens when towing and then stopping. I'm not optimistic that a diagnostic will turn up anything. Has anyone had a similar issue, or does anyone have any thoughts of things I should ask the dealer to check?

Thanks in advance for any help. This is my first ever F150 and I'm so far quite disappointed and frustrated to have this issue on a brand new truck.

 

The auto stop start may be the problem. You can disable it you know?

 

Yeah, not impressed with the Auto Start/Stop. Ironically, it's supposed to be automatically disabled when a trailer is connected. How do you permanently disable it? And does disabling it effect warranty...because that would be a no go for me with the problems I've already had.

 

https://www.thegeekpub.com/15242/dis...ly-ford-f-150/

 

From what I can tell the issue with towing / vehicle stall seems to get reduced when you feed the beast with high octane fuel. This seems to have made most of my towing then vehicle stall issues reduce significantly.