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Did Tesla just slow down our cars?

Did Tesla just slow down our cars?

It seems in the latest update that my Model 3 is much slower off the line. It doesn't throw you into the seat like it used to!

Did Tesla purposefully reduce acceleration? Can we please get it back?

spuzzz123 | May 31, 2018

@Meni -- No way should your M3 do NOTHING when you punch the accelerator. That is not the performance lag people are talking about with these releases. They are talking about 0.1 - 0.3 second slower from 0-60, not a complete nonresponsiveness. If repeatable, suggest you take to service.

Brandon.J.Apperson | May 31, 2018

Well I was hesitant (didn't want to lose acceleration) but finally updated last night to 2018.18.13. Don't feel any difference in acceleration whether it be off the line or from different varying speeds. Will do another 0-60 test when I get time but I think I agree with spuzzz that if you have a drastic difference should probably take in to your service center. And don't be afraid to update - I would imagine the improvement in braking distance outweighs a little loss in acceleration (if there indeed is any).

mfong | May 31, 2018

@LostInTx I would have to agree with your wife. Go Bears!

nicktrash | May 31, 2018

@brandon. Were you on 18.30 prior, or something before that? My understanding is that the performance reduction came in 8.30 (actually an earlier release) rather than 8.13. By 8.13, it would have already been resident.

SamO | May 31, 2018

I'm keeping my car in Chill Mode. No difference in Chill Mode acceleration with update.

;-)

jerry.fioramonti | May 31, 2018

Got my car 2 days ago and was already on the latest version so I don’t have a real comparison. But I will say that when I’ve punched it from a standstill it feels like my stomach is going to fly out my rear end. Again I don’t have a fair comparison, but if what I have is throttled then I’m not sure I want it uncorked or I may have to resort to chill mode to keep my organs inside my body.

Brandon.J.Apperson | May 31, 2018

@nick I was on v 16.x before when i tested 4.99s 0-60. (posted earlier on this thread)

Brian B | June 1, 2018

I wonder if the battery charge percentage plays a difference in Accel rate. Anyone notice the lag at high charge state (>260)

nicktrash | June 1, 2018

picked up car today, was already on 18.13..so I have nothing to compare it to. But, it's pretty darn quick. Certainly quick 'enough', wonder what it was like or could be like back on pre 18.30.. maybe someday we'll see.

otherwise, perfect.

highlandson | June 2, 2018

I'm so glad to have found this thread. I can ABSOLUTELY confirm this. My wife and I were Leaf owners previously. We picked up the Model 3 and it crushed the Leaf in terms of acceleration.

Updated software for the brake fix and we both separately remarked to one another that suddenly the Model 3 felt very typical, very similar to the go-cart but gutless acceleration of the Leaf. Still quick off the line, but similar to a typical EV.

When we first got the Model 3 it felt like a head-whipping acceleration, but with an assured grip on the road and with plenty left if you really wanted to get nuts with it. Now, just feels like a Leaf to me.

Super bummed.

MarylandS85 | June 2, 2018

I appreciate everyone’s subjective impressions of changed acceleration, especially those who noticed it before reading this thread. Still, there is no merit in stating that it is “fact” or using words like “absolute” or “definite.” Human perception is imperfect to say the least. Not everyone is noticing the difference in acceleration, including me. Is it possible, maybe even likely that something is different? Of course. Is it conclusive or universal? No, it is not.

Ross1 | June 2, 2018

Here you go:

Someone at The Verge just wrote an article about this thread, and quoted some of you. Got it in my news feed in AUS.

https://www.theverge.com/2018/6/2/17413732/tesla-over-the-air-software-u...

pierpont | June 2, 2018

that's pretty cool

chasemyaccord | June 3, 2018

After having my car at the SC for two weeks, I finally got it back. When I turned it in, it had version 14.x but I got it back with 18.3. My loaner was a 75D and I remember first feeling like it had very similar kick to my M3. As soon as i got my car last night, my first thought was it felt substantially slower at accelerating. Not nearly as punchy as it used to feel. I'm petty confident about this one. Glad I'm not the only one.

leo33 | June 3, 2018

That Verge article was pretty good. Considering the fact that Tesla says they made no changes to acceleration, I will give no weight to anecdotal reports unless supported by objective and verified measurements.

SO | June 3, 2018

We need another dragtimes vbox assessment. Human perception is often flawed.

shrazzy | June 3, 2018

Have people been tweeting to Elon about it? Also reported as a bug?

Louis.Ferreira | June 3, 2018

Are you guys turning off your traction control? Slip start makes a huge difference in the feel of the car, but is probably horrible for the tires...

johnyi | June 3, 2018

Seems like we would need a 0-10 measure before/after in addition to 0-60. Reports are of sluggish response off the line rather than lack of power.

coolnewworld | June 4, 2018

Sluggish off the line is exactly what's happening now. :(

SamO | June 4, 2018

Fake news. No sluggish acceleration. Unless you have pre and post vbox readouts, I just don’t believe anyone.

slasher0016 | June 4, 2018

This is all a conspiracy to get Tesla to release a software update to get our cars to 4.4 0-60. And I'm ok with that!

eeb9 | June 4, 2018

The only thing I'll have to compare against in my MINI. The Model 3 should be about a half-second faster 0-60, without needing to do the whole "launch mode" thing.

So long as it's doing that, I'm golden.

Mind you, I'm not expecting it to *handle* like the MINI (a foot wider, two feet longer and 1000 pounds heavier...? Nah.) But I do expect it to both *feel* and actually *be* slightly quicker

Bated Breath | June 4, 2018

I believe the owners who noticed a decrease in acceleration from 0 - 20. I hope the original acceleration is restored or at least Tesla explains what happened and why.

Shock | June 4, 2018

"I appreciate everyone’s subjective impressions of changed acceleration, especially those who noticed it before reading this thread. Still, there is no merit in stating that it is “fact” or using words like “absolute” or “definite.” Human perception is imperfect to say the least. Not everyone is noticing the difference in acceleration, including me. Is it possible, maybe even likely that something is different? Of course. Is it conclusive or universal? No, it is not."

This. Two week old thread with over 200 replies and it looks like STILL nobody has even proven unequivocally that this is a thing.

Bated Breath | June 4, 2018

Everyone agrees it hasn't been proven.

pdet | June 4, 2018

I think this goes beyond whether the acceleration has been affected or not. I think we're all trying to grapple with what it means to own a product when it's features and functions can be changed without the owners "effective" say so (yes.. you can say no to the update, but you'll never get an update again).

So, hypothetically, if the M3 was spec'd at 0-60 at say 5.5 sec, and the actual car did 4.5 sec. However, when the performance model is out, they reduce the acceleration of the baseline car from 4.5sec to 5.5sec to improve sales of the performance model. Would Tesla be within their rights to do so, and how would we as owners feel about that?

RSavage_92024 | June 4, 2018

@tedp nailed it. Without commenting specifically on the performance 'issue', I think we all expect there to be changes that we like, and those we aren't crazy about or have no use for. As far as changing specs going forward, that's certainly Tesla's right. Performance, on the other hand, is a third rail issue. I'm doubting anyone would complain about upgraded performance, but, hypothetically, losing performance you already had might not be so universally cheered.

SamO | June 4, 2018

Wait . . . people like things to get better and complain when things they like change?

I'm Jacks total lack of surprise.

Shock | June 4, 2018

This is not a difficult issue to deal with. Every code release should come with specific details about what was changed. You can see this on any consumer product, though discipline to the specificity varies hugely by vendor.

Does Tesla specifically say what the patches include at a detailed level? If not, they should, then this thread never happens again.

If they already do, since nothing was mentioned about acceleration, if there was a change it is reasonable to think it was unintentional, so it would be a defect to be corrected in a subsequent release.

MarylandS85 | June 4, 2018

Yes, Tesla does release notes showing what’s been updated, although they only announce new features. Bug fixes aren’t specifically elucidated. I’m personally happy with the current process, but I wouldn’t mind a little more granularity in the bug fix domain. For those who are worried about potential issues, just choose not to update your firmware until you read what other forum posters have to say about it.

cornellio | June 4, 2018

Why hasn't one of those youtube speed testers retested? Maybe we should ask them.

pdet | June 4, 2018

I don't think release notes are enough. Even if the release note said "We reduced the acceleration", there is no choice to accept/reject that individual change without ever taking another upgrade again.

pdet | June 4, 2018

I don't think release notes are enough. Even if the release note said "We reduced the acceleration", there is no choice to accept/reject that individual change without ever taking another upgrade again.

MarylandS85 | June 4, 2018

@tedp
You have a valid point. First, Tesla doesn’t announce ahead of time what the update will do. You only find out after installing. So if you’re worried, wait and see what the forum posters say. Second, if the update is something you don’t love and isn’t a bug that will be fixed in a future update, you are stuck on that firmware version “forever.” But that’s not any different than a smart phone operating system update, and it’s the nature of the animal. My suggestion is to embrace change. I find excitement in updates and discovering new tricks and conveniences in my car (and my phone).

These are good problems to have. It’s waaaaay better than all other automakers’ antiquated style of never updating or updating only if you take your car in to the dealership (and usually minor updates).

thomas.hitchcock | June 4, 2018

I downloaded 2018.20.5 today and my car actually “seems” to have a bit more punch now. I made a 0-60 video and have the following extremely rough estimates based on the video: after 1 second 7 mph, after 2 seconds 19 mph, after 3 seconds 32 mph, after 4 seconds 44 mph, after 5 seconds 60 mph. This was slightly up hill.

billlake2000 | June 4, 2018

@thomasalfred, did you happen to notice that earlier you had some "punch", and that you had lost "the punch", and now you got "punch" again? Were you early enough software to have felt the "snap your head back"? Thank you.

coolnewworld | June 4, 2018

Maryland said "My suggestion is to embrace change." Not if it cuts my acceleration. Forget that!!!!!!

thomas.hitchcock | June 5, 2018

@billake yes, I felt like I had lost some punch a few updates ago. I am not sure if it is back to the power I thought I had when I first got it, but it seems close now.

PTdenver | June 5, 2018

@tedp 5.5 is short range battery time, 5.1 is LR 0-60

Agent_86 | June 15, 2018

I just got the latest update and it definitely feels different. I had my car delivered just after the update that allegedly impacted acceleration, so I didn't have a "below" to compare to, but did notice it was odd that the car had less jerk than I was expecting off the line, and felt like it picked up steam around 20 mph. While I did not do any instrument testing, it did feel odd that car seemed to have what felt like turbo lag. That's now gone with the new update. This is totally unscientific, but the acceleration from a dead stop now feels flat and there is much more jerk from the start. I don't know if it gets to 60 faster, or if they just tweaked the acceleration curve, but it certainly feels different.

billlake2000 | June 15, 2018

Thanks 4 posting.

Tuning In | June 15, 2018

Plenty fast and plenty fun, but my 2018 Leaf feels like it's putting down a lot more power from a standstill. That extra off the line power is inconsequential after 10mph. Perhaps they are trying to protect wear and tear on the drivetrain and limiting off the line power delivery, which is when there is the most stress. If that were the case, it would be good to put in some sort of feature that's akin to launch control where you can select full, unrestricted power for those special occasions.

seattlemag | June 15, 2018

Agreed

Bated Breath | June 16, 2018

What is the latest update that may provide more oomph? I am on 2018.18.14

weluvm3 | June 16, 2018

“If that were the case, it would be good to put in some sort of feature that's akin to launch control where you can select full, unrestricted power for those special occasions.”

I use my accelerator pedal to control my rate of acceleration. It works fine for me. I don’t need an additional control.

pierpont | June 16, 2018

just add the SpaceX option package and you'll be fine

Agent_86 | June 16, 2018

I'm on 2018.21.9 and that's the one that made the acceleration feel flatter and more of a jerk off the line versus the increase I felt around 20 mph before.

mfong | June 16, 2018

So I went on my first drive on 2018.21.9 from 2018.18.13 (I think), and I didn't really notice much change in the off-the-line acceleration. But on the freeway, I did notice something bad.

I was going maybe 60 MPH and wanted to pass a car on my right so I could exit, I literally floored it and the instant acceleration I used to get, seemed to be gone. It was still fast enough to make the pass, but I wrote on these forums 5 weeks ago (2 weeks after getting the car) that I didn't even have to floor it to quickly go from 65 to 90 to make a quick pass. I did have my wife and kids in the car this time, but I wouldn't expect that to make this much of a difference.

I sure hope they didn't mess with the acceleration at higher speeds. OTA updates are nice and all for adding and improving features, but I am actually not that wild about the possibility of perceived downgrades in performance or "fun" factor.

Cdotpeterman | June 16, 2018

First P3 came off the line today. Invites in a few days?

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