Sudden loss of power auto shifting from 1st to 2nd

[relak]

This has only happened a couple of times recently but still weird. Today I was sitting at a light and gradually applied the gas in first gear. It was normal acceleration, not too hard but also not out of the norm slow. When the truck shifted from first to second I could feel the pedal had less tension in it and the truck was no longer accelerating but instead slowing down in a coast similar to when you left off the gas. It didn’t last more than 2-3 seconds before the engine kicked back in and the truck started to accelerate again.

I’m wondering what the possible cause for this could be? Truck has 18,500 miles on it and only “mod” is a K&N drop in filter. Think maybe a faulty transmission sensor or the TCU having issues? Any ideas? Don’t want to bring it into the dealer if I can’t replicate it and it’s only happened a couple of times so far.

**other posts mention traction control kicking in but that’s not the case here I’m certain of it. I was under pretty light acceleration in a straight line. Just throwing that out there before that gets suggested**

 

[Chuckaroo91]

I've had this issue before where it feels like its hunting for the gear. Pulled out from side street, massive hesitation from the truck then started going again after 2-3 seconds. Local dealership said they updated some software that should fix the issue when I brought it in. Maybe worth calling and seeing if they can take a look. Alternatively could do the AP and a TCM tune

 

[relak]

Won’t be doing a tune until it’s out of warranty. Had too many issues with Ford to risk it. Any idea what software was updated when they did yours?

 

[FordTechOne]

The accelerator pedal isn’t actually connected to anything; the feel cannot change. It just has an internal spring for pedal feel/return.

As far as the delayed shift, there may be an updated calibration available to resolve it. The service bulletin doesn’t call out specific build dates or concerns, but has the dealer check for updates with the scan tool.

 

[Aleja_333]

Every week I commit to going all-in with the Cobb Stage 2 package and Goosetune, and then I read posts like these and start to hesitate. I want to tune the truck so bad but I hate to be the one on the side of the road with random issues like these one. I agree there are too many of these to risk voiding the warranty.

This is why sometimes I want to entertain the idea of buying an R, but I don't really want 8 mile to the gallon.

 

[Chuckaroo91]

Sounds like its a computer / software related issue vs a hardware issue based on this other thread.

Sudden loss of power

I left the house today and pulled off of my street and noticing the car back behind me was going faster than expected, I floored it. At about 45-50 the truck suddenly seemed to lose power for a second then immediately picked back up normally. That's at least the second time it has done that...

www.fordraptorforum.com

I pulled the trigger on a Cobb AP and will be adding Goose Stg. 1 and TCM tune.

 

[Gsteve]

i had a engine light come on , had low lower, like barely could pass a car on the highway. turned it off and restarted it.... all fine. wth

 

[MORaptor1]

Every week I commit to going all-in with the Cobb Stage 2 package and Goosetune, and then I read posts like these and start to hesitate. I want to tune the truck so bad but I hate to be the one on the side of the road with random issues like these one. I agree there are too many of these to risk voiding the warranty.

This is why sometimes I want to entertain the idea of buying an R, but I don't really want 8 mile to the gallon.

LOL! So you will drop 150k+ on a F150 and then complain about filling it up? Thats new.

 

[Aleja_333]

LOL! So you will drop 150k+ on a F150 and then complain about filling it up? Thats new.

1. I wouldn't buy an R for $150k.
2. Since when the price of a car became correlated to better or worse mpg? As your comment suggests.
3. I'm not complaining about filling up, I just don't want 8 miles to the gallon.

It's very simple, I want more power but not half of the mpg that I get now. That's what I would get if I tune my current truck. Yes I want my cake and eat it too.

 

[relak]

The accelerator pedal isn’t actually connected to anything; the feel cannot change. It just has an internal spring for pedal feel/return.

As far as the delayed shift, there may be an updated calibration available to resolve it. The service bulletin doesn’t call out specific build dates or concerns, but has the dealer check for updates with the scan tool.

Yeah it just feels like a delayed reaction getting it into second gear and accelerating again. I’ll scan it this weekend and see if it’s throwing any codes and call my dealer on Monday to see if there’s any updates.