Warped rotors AGAIN!?!?!

[HuntingPudel]

Agreed that there may be some weird setup issue, bad parts, and/or something funky about the roads. I don't have a ton of miles on my car but I do drive it hard. No rotor warpage yet.

Sponsored

 

[TallNate]

My 2021 had warped rotors needing to be machined, and new pads and rotors twice, all under 30,000 miles. One of the times they blamed the previous dealer for installing the pads backwards.

I was full-time on 1PD, always tried to minimize the use of the brake pedal, and only occasionally drove aggressively.

But that 2021 first year model had a lot of issues, especially software and the front camera nightmare for a while.

 

[dolvio]

My 2021 had warped rotors needing to be machined, and new pads and rotors twice, all under 30,000 miles. One of the times they blamed the previous dealer for installing the pads backwards.

I was full-time on 1PD, always tried to minimize the use of the brake pedal, and only occasionally drove aggressively.

But that 2021 first year model had a lot of issues, especially software and the front camera nightmare for a while.

interesting. I’m fully aware of how the car works and operated during 1 or 2 pedal. Brakes are being applied when pulling foot off the brake pedal and in regen at higher speeds. I had the rotors fixed once before and the vibrations are now back again. Same scenario. Same SoC.

 

[Kamuelaflyer]

I’m fully aware of how the car works and operated during 1 or 2 pedal. Brakes are being applied when pulling foot off the brake pedal and in regen at higher speeds

Therein lies your issue. If mechanical braking is really being applied when pulling your foot off the accelerator pedal or brake pedal, then thats a problem and could be the source of your repeated warping issue. Because, thats not how regen braking works, its also not how mechanical braking works.

 

[dolvio]

Therein lies your issue. If mechanical braking is really being applied when pulling your foot off the accelerator pedal or brake pedal, then thats a problem and could be the source of your repeated warping issue. Because, thats not how regen braking works, its also not how mechanical braking works.

This is what I am trying to get at. It’s been to the dealer and now has to go back again for this.

 

[Triggerhappy007]

interesting. I’m fully aware of how the car works and operated during 1 or 2 pedal. Brakes are being applied when pulling foot off the brake pedal and in regen at higher speeds. I had the rotors fixed once before and the vibrations are now back again. Same scenario. Same SoC.

Try it on Whisper Mode. Any braking when you lift off the pedal on 2P mode and in Whisper?

 

[Triggerhappy007]

I've had 3 Mach-Es, no warping issues over 105,000 miles. Here's how thick the pads are after 40k:

 

[Earplug]

Check the torque on your wheel nuts. Over torquing the lugs can warp the hub face or the rotor itself due to unequal tension in the metal.

 

[jefftuck]

Sorry if this is an obvious question, but are you sure they’re really warped?

I know you say you use 2pd to burn off the corrosion, but it wouldn’t be very effective unless you’re slamming on the brakes a lot.

Have you tried the method of getting up to speed, shifting to N, then braking fairly hard to definitely get those pads engaged? Do that several times and see if the vibrations change.

 

[dolvio]

Try it on Whisper Mode. Any braking when you lift off the pedal on 2P mode and in Whisper?

Sorry if this is an obvious question, but are you sure they’re really warped?

I know you say you use 2pd to burn off the corrosion, but it wouldn’t be very effective unless you’re slamming on the brakes a lot.

Have you tried the method of getting up to speed, shifting to N, then braking fairly hard to definitely get those pads engaged? Do that several times and see if the vibrations change.

Yes I do. It’s also good the bed the pads this way as well. Not sure what’s going on.

 

[Kamuelaflyer]

Yes I do. It’s also good the bed the pads this way as well. Not sure what’s going on.

Most of the discussion to this point has been due to a semantics issue. If your car is applying mechanical braking when using 1pd and pulling your foot off the accelerator, there’s a brake problem. Same thing with 2pd drive and light brake application. The underlying cause needs to addressed by a competent dealership. Simply replacing the rotors (etc) wont resolve the issue unless they also happen to inadvertently fix it while dealing with the rotors. Make sure the dealer understands just how your car is a actually braking and how wrong/off/messed up that is from a normal mach-e..

 

[Trueblue3605]

I think that’s maybe what’s causing this. The 1 pedal.

! pedal driving does not use the breakes, it uses resistance from the electric motor.

 

[ATL]

How many of the rotors are actually out of true? It only takes one to produce some pretty bad vibration.

There's a lot of discussion above regarding how the regenerative braking works and is programmed but could it be a purely mechanical issue with a seized or sticky caliper causing drag and resulting heat-induced warping? This might be a bit hard to detect in use without demounting, due to the nature of the regen.

I also clean the rotor faces regularly using the accelerate then brake method and haven't experience rotor issues.

 

[ReverendPete]

interesting. I’m fully aware of how the car works and operated during 1 or 2 pedal. Brakes are being applied when pulling foot off the brake pedal and in regen at higher speeds. I had the rotors fixed once before and the vibrations are now back again. Same scenario. Same SoC.

Therein lies your issue. If mechanical braking is really being applied when pulling your foot off the accelerator pedal or brake pedal, then thats a problem and could be the source of your repeated warping issue. Because, thats not how regen braking works, its also not how mechanical braking works.

Being a Select model, I believe it wouldn't have the power meter bar on the IPC, but that can be enabled if you have Forscan and an OBDII connector. That might give you a little bit more information, like is the regen actually working in 1PD, etc.

At least for me, if I'm paying very close attention when braking (2PD), I believe I can feel when the friction brakes engage during braking. If you're getting the vibration right away when letting off the accelerator in 1PD (and the vibration is truly from the friction brakes), then that would seem to point to a problem with the regen. I don't know enough about 1PD to know how quickly it would kick in the friction brakes when letting off the accelerator at a high rate of speed...

 

[dolvio]

Being a Select model, I believe it wouldn't have the power meter bar on the IPC, but that can be enabled if you have Forscan and an OBDII connector. That might give you a little bit more information, like is the regen actually working in 1PD, etc.

At least for me, if I'm paying very close attention when braking (2PD), I believe I can feel when the friction brakes engage during braking. If you're getting the vibration right away when letting off the accelerator in 1PD (and the vibration is truly from the friction brakes), then that would seem to point to a problem with the regen. I don't know enough about 1PD to know how quickly it would kick in the friction brakes when letting off the accelerator at a high rate of speed...

Few more things to add.

When charged to 100% and in one pedal I get serious vibrations when braking at 60-80mph.

When in two pedal and not charged to 100% I don’t seem to feel much vibration. Some but not much.

I bedded the brakes again today on an open road and the let them cool down.

really not sure what’s up here.

Sponsored