Mach E GT 70+ Acceleration Issue - Video

[breeves002]

So I've heard a bunch about this issue and have it myself on my GT. I was doing some backroading this afternoon and noticed the power meter in the bottom left displays a limit once you get up to higher speeds which is reducing current output even at full throttle.

I know this has been beat up in other threads but wanted to post this video for others to see how the actual issue manifests.

Is this a software limitation? Can the motors not accept full current above x rpm?

Just an interesting observation, have others seen this power limit kicking down when accelerating up higher speeds?

I hadn't seen anyone else post a video so wanted to post this one. I do not believe it was an issue with the battery being too hot as I had barely been driving hard and as far as I could tell the battery cooling wasn't even on. Heard no fan or AC compressor (HVAC was off).

I will do more testing.

Last note - this car has the latest update for the PCM and both motors. I ran the update on 9/18 so unless one came out this week it is latest.

Sponsored

 

[CompilerBreak]

There's like, 1000+ pages on this in other threads, however I really can't recommend reading them tldr, the overall charge of your vehicle has some effect (higher charge is better) but the consensus is there's something off about the power curve. Whether that is something which can be fixed or not, who knows. People are waiting for the media events in October for the GT model to see an official response.

 

[Mach E JT]

Exactly as expected, somewhere around 81mph there is a noticeable drop in power output. Even from 30mph start in addition to standing start 1/4 mile runs.

 

[Mach-E-Ato]

Is the power meter a GT-only thing? I don't have it in my non-GT Mach-E.

 

[Mach1E]

So I've heard a bunch about this issue and have it myself on my GT. I was doing some backroading this afternoon and noticed the power meter in the bottom left displays a limit once you get up to higher speeds which is reducing current output even at full throttle.

Is this a software limitation? Can the motors not accept full current above x rpm?

Just an interesting observation, have others seen this power limit kicking down when accelerating up higher speeds?

I hadn't seen anyone else post a video so wanted to post this one. I do not believe it was an issue with the battery being too hot as I had barely been driving hard and as far as I could tell the battery cooling wasn't even on. Heard no fan or AC compressor (HVAC was off).

I will do more testing.

Thanks for posting!

Definitely a visual representation of what we are seeing in the numbers.

Even the car is telling you it’s limiting power. I also noticed when you slowed down and punched it again, it wasn’t full power.

Seems like they’re being absurdly cautious with power limitation.

 

[Electric Goat]

Were you driving in unbridled extend?

 

[breeves002]

Yeah I know there were threads on it but honestly couldn't find any videos. I've missed it all.

Is the power meter a GT-only thing? I don't have it in my non-GT Mach-E.

Hopefully added later.

 

[Mach1E]

Yeah I know there were threads on it but honestly couldn't find any videos. I've missed it all.



Hopefully added later.

There aren’t other videos.

As you do more testing, see how long it takes for the car to “recover” before giving you full power again after the 4 seconds of full throttle it gave you.

Power meter in the video started dropping before 80 mph, then was way down in your 2nd 30-50 punch.

 

[sotek2345]

Thank you so much for this. While not as fast as we would all like, that still seems like plenty of power to pass safely at highway speeds.

 

[Mach1E]

Thinking about this more, I do see this as possibly GOOD news. It could mean the power is there, but it’s not letting us access it.

Can you also do a 75-100 video to see if it cuts power right away or if you get 4 seconds again?

 

[Mach1E]

Thank you so much for this. While not as fast as we would all like, that still seems like plenty of power to pass safely at highway speeds.

Boo! No using words like “plenty” or “adequate” where Ford could read them.

Those are NOT appropriate descriptions of a top tier “performance edition.”

That Honda 2.0t has plenty of power to pass on the highway. So does my wife’s old minivan.

 

[breeves002]

Thinking about this more, I do see this as possibly GOOD news. It could mean the power is there, but it’s not letting us access it.

Can you also do a 75-100 video to see if it cuts power right away or if you get 4 seconds again?

Yes, eventually when I have somewhere I can do it. I did hit about 110 on my drive home from the dealer but my FE still has gone faster than the GT at the good ol' max 113mph.

 

[blue92lx]

Yeah the other threads are super long with dragy times and whatever else, but this is actually what we needed. A visual representation of exactly what's happening. Doesn't do anything to help the question of why ford is doing this, but it'll stop the speculation of what's actually happening.

This definitely seems like an OTA fix that Ford needs to let out. They're clearly limiting the motors. If it's to protect the batteries, they're being kind of obnoxious about it.

 

[Scooby24]

Awesome, so we get like 1 pull unrestricted on a drive for a few seconds and then power limited for god knows how long afterword. Well. This sucks.

 

[iankellogg]

is there any chance this is entirely a limit of back EMF and what RPM flux weakening is being turned on? If so there might not be too much that can be done other than tweaks to the flux weakening.

Tesla has a switched reluctance motor and an induction motor, both don't have back emf that cause high speed loss of power.

Sponsored