Problems with FSD Maintaining Set Speed <65MPH?

[rkpgmp1]

Is anyone having issues with FSD maintaining speed when set in the 60-65 MPH range? I will set mine at 62 in a 55 MPH zone, and it will maintain for a few minutes, and then drop down into the mid 50's, or it will suddenly accelerate to high 60's. Speed profile is set to STANDARD. This issue only started about a month ago. Until then, it worked fine. When I set the speed to the low 70's in a 70MPH zone, it will stay there all day, at least until the battery drains. Thanks all!

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[devdrone6]

There is no way to set speed, not sure what you mean by this. FSD goes by mapped speed and your set profile, and by traffic. We lost control of actual speed options a while back, and that sucks. I have to switch between chill, standard, hurry to avoid getting a ticket.

 

[That Beast Mode]

There is no way to set speed, not sure what you mean by this. FSD goes by mapped speed and your set profile, and by traffic. We lost control of actual speed options a while back, and that sucks. I have to switch between chill, standard, hurry to avoid getting a ticket.

I think he is confusing max speed with being able to set the FSD speed. OP are you referring to setting the speed using the right scroll wheel? If so, it does nothing for FSD other than it won't go above that number. The only way currently to change the speed of FSD besides changing modes is to press the accelerator pedal.

 

[rkpgmp1]

There is no way to set speed, not sure what you mean by this. FSD goes by mapped speed and your set profile, and by traffic. We lost control of actual speed options a while back, and that sucks. I have to switch between chill, standard, hurry to avoid getting a ticket.

So, may be I am confused? I thought that the speed was set at whatever speed you were going when you pressed the FSD button or pressed the right thumbwheel (i.e., that was the speed that you wanted to engage)?

 

[devdrone6]

Nope, you don’t set the speed- you just turn on FSd. The profile is all you choose, it does the rest.

 

[jameslook]

Maintaining or attaining speed is seriously the only problem I have with FSD. It will chug along at 55 km/h heading into a 100 km/h zone. You always have to initially get it up to speed. Or have to push accelerator to get it to an adequate speed. It will try to go 85 in a 100 which would get me killed. So I use the accelerator to push it to 111 on hwy. it seems to like that speed and will stay there. It’s just something you have to live with. Until they do an update. I have the 2026 update maybe it’s better?

 

[CyberGus]

The FSD speed profiles appear to be using AI logic to drive at the speed of the surrounding traffic. When there are few other vehicles, it makes strange choices.

Most annoying for my recent road trip was the inability to maintain spacing on a long stretch of two-lane road where passing is impossible. Either I was getting tailgated, or was tailgating the car in front. We're stuck here for awhile, just maintain a polite distance, geez

 

[jameslook]

The FSD speed profiles appear to be using AI logic to drive at the speed of the surrounding traffic. When there are few other vehicles, it makes strange choices.

Most annoying for my recent road trip was the inability to maintain spacing on a long stretch of two-lane road where passing is impossible. Either I was getting tailgated, or was tailgating the car in front. We're stuck here for awhile, just maintain a polite distance, geez

It could be worse. I like to stay further behind people to avoid rocks flying so yes, that’s annoying but you just deal either way it. It’s still pretty amazing.
Terrible but I’m going to say it at times you just wish they had standard cruise control with a set speed

 

[NICKEM]

This is really bad when the posted speed is 70 yet the CT does not recognize it. The screen shows 55 for miles and miles (US hwy 31 from Kilgore to Tyler TX)... I have had to use "hurry" or "madmax" to get to 70 mph. I wish I could go back to speed control on the wheel like it was a year ago.

 

[CyberGus]

It could be worse. I like to stay further behind people to avoid rocks flying so yes, that’s annoying but you just deal either way it. It’s still pretty amazing.
Terrible but I’m going to say it at times you just wish they had standard cruise control with a set speed

Follow-distance should be relative to traffic density. In rush-hour traffic, you can't leave a comfortable distance to the vehicle in front of you, or another car will move in lol.

But in sparse traffic, following that closely is just rude and aggressive. If I'm stuck behind them, then tailgating won't get me there any faster.

The speed profiles either want to overtake, or slow down so much that the forward vehicle pulls away.

I drove 1000+ miles over a long weekend, and FSD was my pilot 99% of the time, which was great. But I had to constantly monitor and adjust speed.

 

[CyberGus]

This is really bad when the posted speed is 70 yet the CT does not recognize it. The screen shows 55 for miles and miles (US hwy 31 from Kilgore to Tyler TX)... I have had to use "hurry" or "madmax" to get to 70 mph. I wish I could go back to speed control on the wheel like it was a year ago.

Using a "set speed" would be preferable for the time being, since the current system is unreliable. I'm sure it will be improved, but we could give Tesla more meaningful feedback if the screen provided detailed info about the chosen speed (map data vs. sign reading vs. traffic vs. road conditions etc.)

 

[roebling]

Is anyone having issues with FSD maintaining speed when set in the 60-65 MPH range? I will set mine at 62 in a 55 MPH zone, and it will maintain for a few minutes, and then drop down into the mid 50's, or it will suddenly accelerate to high 60's. Speed profile is set to STANDARD. This issue only started about a month ago. Until then, it worked fine. When I set the speed to the low 70's in a 70MPH zone, it will stay there all day, at least until the battery drains. Thanks all!

New FSD is worse, doesn't allow "setting" speed limits, substitutes 5 levels of haul ass. The slowest level, dubbed "sloth" mode, limits the vehicle to the posted speed, where speed limits are posted. When no speed limit is posted and the road is narrow, twisted, hilly, has no shoulders and vision of pedestrians and wildlife ahead is obscured by thick and untrimmed vegetation, then FSD sloth mode propels the car at about twice the safe speed.

 

[meinnovations]

@CyberGus (haven't figured out the quote function yet), here, here! Speed and drive mode or follow distance like 1st gen MS need to be set independently. And, no drive mode should camp in the passing (left) lane. This is illegal in some (most?) states, though seldom enforced in my experience. In any mode with heavy traffic the follow distance is too far, so people cut you off, effectively moving you backwards on the highway. With heavy traffic moving at speed limit, standard mode seems to be 10% over posted speed limit, hurry 20%, and mad max no limit. That said, with sparse traffic, even standard mode exceeds 10% of speed limit. In WA 67 in 60 can get you a ticket. In CA you get road raged. IMHO setting max speed (R scroll wheel, perhaps), follow distance (L scroll wheel?), and drive mode on the console would allow safest and most courteous driving without worrying about tickets. I wish we could turn off FSD and switch to adaptive CC on the fly, but at least we can hit the accelerator to do "California stops" in FSD or on highway to speed things up (and get warning when inadvertently hitting it). Rivian has a nice adaptive CC with lane assist. Allows you to draft on semi trailers to save 20%. It will also change lanes automatically using turn signals - better than FSD on the highway IMHO.

 

[georgek43]

The FSD speed profiles appear to be using AI logic to drive at the speed of the surrounding traffic. When there are few other vehicles, it makes strange choices.

Most annoying for my recent road trip was the inability to maintain spacing on a long stretch of two-lane road where passing is impossible. Either I was getting tailgated, or was tailgating the car in front. We're stuck here for awhile, just maintain a polite distance, geez

I’ve been saying this since the FSD14 update. AI simply cannot set a reasonable speed and it will never be better at setting the speed the driver wants than the actual driver. There are just too many variables. In the real world, we’re quite a ways from safe and sensible E2E autonomy.

Some love the new speed profiles, many just accept them. I think they have ruined FSD. And although I hear praise in this forum, every single real Tesla owner I personally know hates not being able to set the speed, which seems to be almost always too slow or too fast or erratic for all real conditions except on a crowded highway. AI speed selection seriously degrades both safety and relaxation for me when using FSD.

And constantly flipping through profiles to try to imprecisely correct the speed requires MORE input, not less. How is that a step toward autonomous driving? BTW, Tesla is still very clear that FSD is a driver assist system, and does not constitute autonomous driving. So why pretend? The driver assist system was truly excellent when the driver could correct the speed- now, not so much (for my use anyway)

FSD14 may drive better but for me FSD13 was overall much better because I could adjust the speed on the fly and could set my personal parameters for max speed.

It’s been 4 months now since we lost the ability to manage speed - I’m not optimistic that the ‘we know better than the customers’ developers will bring it back. They’ve been handed a mission to create E2E autonomy it’s clearly not their mission to have satisfied owners. It’s a sad loss for me. I’d like to at least have the option returned, like maybe a ‘DriverMax’ profile on top of ‘MadMax’.

 

[CyberGus]

AI simply cannot set a reasonable speed and it will never be better at setting the speed the driver wants than the actual driver.

Never say never.

Tesla absolutely must get this right for RoboTaxi, because passengers will have no control whatsoever.

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