r/f150ecoboost

So my 2016 2.7 still had the original battery in it and after almost 11 years it was time. I swapped it out with a H6 Diehard Platnum. Truck drove fine rest of the day no issues. Went to fireworks on Saturday night, started up fine and was on the way home when all power was just gone halfway up a pretty steep hill. Gave it some gas and it was barely moving but when I hit the top and it leveled out she took off again like nothing happened. No lights on the dash. Sunday took it downtown and made it roughly 3/4 of a mile from my house and loss all power again only this time on flat road no dash lights again. Pulled over, shut it off and restarted problem gone again. Any ideas on what is going on? I have to take it on a 600 + mile trip from Vermont to Virginia on the 18th for work and I don't want to get halfway there and break down.

Chasing a P0430 - new cat and Motorcraft up/downstream O2 sensors on Bank 2. No other codes. Slight shudder at idle.

Seems to be engine running rich—-

Bank 1 long term fuel trim solid 0 at idle, STFT floats a bit but generally steady at 2.3.

Bank 2, on the other hand, LTFT sticks at -4.7 while STFT sits at 7. At idle, LTFT never comes of -4.7, the STFT will float a bit.

What should I be looking for at this point?

3.5L 2015

2014 f150 Ecoboost 3.5

I am planning to replace the front struts, I do them myself so it's more efficient to get a strut assembly. Since motorcraft doesn't have assemblies, I am looking to get aftermarket Assemblies.

Between rough country , KYB, FCS and Bilstein, which one has a closer to OEM ride? If I am missing other brands I am open to recommendations

Stock 2025 F-150 Tremor 3.5 and I'm noticing something odd that I'm hoping others can weigh in on.

On moderate uphill grades (around 7%) while unloaded, I'll occasionally feel what seems like a slight surge or oscillation. When I look at the cluster, I can see the turbo boost gauge bouncing up and down, and at the same time the RPM needle fluctuates by a couple hundred RPM.

If I lift off the throttle and get back on it, the issue usually disappears. It also seems to go away if I give it more throttle. There are no warning lights, nothing shows in OASIS, and my scanner doesn't find any stored or pending codes.

I drove the exact same routes hundreds of times in my 2018 Raptor and never experienced anything like this.

Has anyone else with a 2024 or 2025 3.5L EcoBoost noticed this? Is this just a quirk of the new transmission/throttle programming, or does it sound like something isn't right? Could it be lugging a bit in 10th gear on an uphill grade? The rpms are usually around 1500-1800 when this happens.

I did a quick search in the EB sub and didn't find anything conclusive, however would running Ethanol free fuel in our trucks be worth it or would it do more harm than good? I currently run 93 in mine and when we go up from Houston to Amarillo (which I can do on a single tank thanks 35g tank) I always bring a bottle of octane booster since I can usually only find 91 up there. From what Ive seen 91 starts after I get passed DFW and up in the panhandle...not sure why but Im getting off on a tangent. TIA

2014 f150

Has anyone tried installing a conversion kit from sync 1 to sync 3? I found some OEM conversion kits with reasonable price.

Trying to see if anyone upgraded their sync. I mostly rely on the carplay navigation but if I am keep the truck it would be nice to have