My 2018 F150 Lariat SuperCrew 4x4, Its got intermittent wipers, along with rain sensing. I've never had it on any other of my vehicles and pretty sure its not suppose to work the way it does. If we have a light drizzle, I'll set it to the first setting. It will start off with a few second delay then speed up to about a one second delay. Then maybe it will just take off and go full blast. No matter what setting it is on, the delay does not work right. Would anyone know if that's a computer issue or a sensor issue? Just on my way home from work tonight, I had them set on the lowest setting and its raining fairly good. The delay is doing good, then suddenly its going ***** out. Wipers slow back down, rain starts pouring, wipers still just cruising long, nice and slow, not even wanting to think about speeding up to try and clear my window.

 

Mine does the same things sometimes. These rain-sense wipers don't work as well as the ones I've had on a couple previous vehicles. For one, they're set way too sensitive. I never move my wiper **** off that very first, lowest, setting.

 

Try turning off your rain sensor.

 

I sometimes forget to turn off wipers, so when it does rain, they come on by themselves. Thats kinda handy, but annoying at the same time especially when they go full send and its barely raining.
I see you have the 3:73 locker. Do you have bigger tires? What kind of fuel economy do you get with the 3:73? I'm trying to find information and anyone that may have swapped out the diffs on their truck. When I found the truck I wanted, it had everything I wanted, (and stuff I didn't want). Its got 3:31 diffs with rear locker. I put 34" tires and 3" lift on my truck. It took my mpg down, as expected. I'd like to gain some power to the wheels, and me, thinking It would only make sense to go to a lower diff ratio, might be thinking crazy.