Hold function on a MT 991
Thread Starter
Instructor
Joined: Jun 2007
Posts: 157
Likes: 6
From: Monterrey
Hold function on a MT 991
Has anybody stalled their car while driving away after being stopped on an incline?
I am embarrased to accept it, haha, but it has happened to me 2-3 times now. I think it is the weird feeling of the car not rolling back like my MT 997 and I don´t know what I do wrong and stall the car.
I am embarrased to accept it, haha, but it has happened to me 2-3 times now. I think it is the weird feeling of the car not rolling back like my MT 997 and I don´t know what I do wrong and stall the car.
Instructor
Joined: Nov 2012
Posts: 178
Likes: 12
First off... Why yes, someone else HAS stalled theirs! 
Secondly, take your foot off the brake entirely - the brake will hold - and then give gas for a normal start and the brake will release when it senses you're not going to roll back, at least that's what it seems like to me.
If you do the usual 'fast off the brake while going to throttle and releasing the clutch' thing, the brake won't be thinking it should let go yet - STALL!
It's annoying most of the time since it turns on at much lower inclines than I'd be inclined to expect it. (Sorry, I felt compelled to write it that way.)
On the other hand, when there's more of a hill I like it because I don't have to worry about pulling a handbrake/releasing it or jumping on the gas really fast. Of course with the electric 'handbrake' (loosely applied in this case), that wouldn't work anyway.
But give it a try on a hill a few times when nobody is behind you and you'll see that there's no rush and that it works fine. My biggest issue is that it still feels like a 'just fall backwards and we'll catch you' trust exercise, and I'm just not a trusting enough person.
Great/fun cars in any case. I would be really happy if it let you set hill hold to only steep grades or just turn it off. (I don't think you can - pretty sure others mentioned you can't. Maybe I should look just to be sure sometime!)
Secondly, take your foot off the brake entirely - the brake will hold - and then give gas for a normal start and the brake will release when it senses you're not going to roll back, at least that's what it seems like to me.
If you do the usual 'fast off the brake while going to throttle and releasing the clutch' thing, the brake won't be thinking it should let go yet - STALL!
It's annoying most of the time since it turns on at much lower inclines than I'd be inclined to expect it. (Sorry, I felt compelled to write it that way.)
On the other hand, when there's more of a hill I like it because I don't have to worry about pulling a handbrake/releasing it or jumping on the gas really fast. Of course with the electric 'handbrake' (loosely applied in this case), that wouldn't work anyway.
But give it a try on a hill a few times when nobody is behind you and you'll see that there's no rush and that it works fine. My biggest issue is that it still feels like a 'just fall backwards and we'll catch you' trust exercise, and I'm just not a trusting enough person.
Great/fun cars in any case. I would be really happy if it let you set hill hold to only steep grades or just turn it off. (I don't think you can - pretty sure others mentioned you can't. Maybe I should look just to be sure sometime!)
Nordschleife Master
Joined: Dec 2012
Posts: 5,430
Likes: 164
From: Upstate NY
WARNING! If you are on a slight hill and the hold function is on, do not try to cut into traffic with a fast start. It will not release fast enough and you will stall. It will only release easy.
Racer
Joined: Jun 2008
Posts: 343
Likes: 1
From: Austin, Texas
Both my MT 997.2 and my new MT Boxster have the hold function and I like it, especially when the person behind you is so close you can see what type of sunglasses they're wearing. The Boxster has a light on the tach that says "Hold" and lights up in green when activated. The idle on the new Boxster is so low, I have stalled it a couple of time, but the start/stop feature restarts the car when you push the clutch. Pretty cool
Three Wheelin'
Joined: Jun 2012
Posts: 1,415
Likes: 370
From: Pensacola, Florida
I DO NOT like the hold or parking park button functions at all. I would love for Porsche or some after-market company to make a handbrake retrofit to fit in the console, or even the drivers side door threshold like some Ferraris have. That would make the 991 the best 911 ever.
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Racer
Joined: Apr 2009
Posts: 264
Likes: 3
From: chevy chase md
It's the one thing I HATE about the 991. After 25 years of driving MT cars, I haven't stalled In traffic or on hills since high school...until I got the 991. In the 986,997 and other cars including my wife's old 1995 Cherokee 5speed, I have never had a problem with feathering the clutch and holding the hill. After a year in the 991, I still stall it monthly. Wish there was an override
Burning Brakes
Joined: Sep 2012
Posts: 1,189
Likes: 198
I find that you cannot simply release the clutch. This almost always leads to a stall.
You have to rev the engine and then release clutch as normal.
It is the same operation required to automatically release the handbrake (only when your seat-belt is applied). If the engine isn't slightly revved, the brake will not release.
You have to rev the engine and then release clutch as normal.
It is the same operation required to automatically release the handbrake (only when your seat-belt is applied). If the engine isn't slightly revved, the brake will not release.
Racer
Joined: Dec 2009
Posts: 496
Likes: 22
From: South Florida
It's the one thing I HATE about the 991. After 25 years of driving MT cars, I haven't stalled In traffic or on hills since high school...until I got the 991. In the 986,997 and other cars including my wife's old 1995 Cherokee 5speed, I have never had a problem with feathering the clutch and holding the hill. After a year in the 991, I still stall it monthly. Wish there was an override
I can't stand it either and in fact I said the same exact thing to my wife just last week! I have owned 6 MT's and never had a problem, since I was in my teens. Now I have stalled this car at least 3-4 times. It's embarrassing, annoying and dangerous. I wish I could disable this "feature".
Pro
Joined: Jan 2013
Posts: 573
Likes: 87
From: SoCal
When ready to go after the hold function is engaged, you have two options. 1) Hit the accelerator and release the clutch, realizing that it's going to take a bit more throttle than normal to power through the brake hold function, or 2) release the foot brake and wait approx. 1-2 seconds for the hold function to release on it's own, then drive off normally. I find I usually use option #2.
Instructor
Joined: Jan 2013
Posts: 176
Likes: 2
IMO it's a totally annoying function and it's really frustrating that it can't be turned off; even my Jeep Wrangler allows for the hill-assist function to be turned off.
I'd stalled the car because of this silliness and an overzealous soccer mom almost ran into me with her oversize SUV; I was lucky in that the car restarted when I pressed the clutch down and allowed me to get the heck out of her way in time.
I purposely informed my service rep that the Hill-assist function is actually an accident waiting to happen, and she assured me that they've been getting many complaints about it, so we're not alone.
I'd stalled the car because of this silliness and an overzealous soccer mom almost ran into me with her oversize SUV; I was lucky in that the car restarted when I pressed the clutch down and allowed me to get the heck out of her way in time.
I purposely informed my service rep that the Hill-assist function is actually an accident waiting to happen, and she assured me that they've been getting many complaints about it, so we're not alone.
Last edited by carrerapete; May 18, 2013 at 06:56 PM. Reason: Grammar
