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Old 11-03-2013, 09:31 PM   #1
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Focus Ti's Sport mode rolling downhill

Here is the scenario:

Pick a long and quite steep downhill (say 5 degrees and more)
Accelerate to about 40-50 miles before downhill starts then just let car roll downhill in "D" (do not touch accelerator) - it will stay in 6th gear and just roll and will most likely accelerate due to the grade.

Try the same thing in "S" and car will downshift after about 5-10 secs into either 4 or in my case 3 gear (engine will obviously rev up) and will drive like this all the way down - it will perform automatic engine braking.


So the ? being is DCT behaving as designed or not? I asked dealership and was told it is but somehow/somewhere it still reeks of BS for me. This is just a regular car - I would understand engine braking programmed into heavy duty trucks' transmission but Focus?

Anyone else came across this or willing to try to reproduce it?




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Old 11-03-2013, 09:43 PM   #2
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It will do that with cruise control, too. I'm not really a fan of it, to be honest.
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Old 11-03-2013, 09:49 PM   #3
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Quote:
Originally Posted by scott7278 View Post
It will do that with cruise control, too. I'm not really a fan of it, to be honest.
This x2. Performing as intended, whether we like it or not.
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Old 11-03-2013, 10:15 PM   #4
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Believe its normal... In sport mode t keeps the revs up

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Old 11-03-2013, 10:39 PM   #5
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Quote:
Originally Posted by narkotskyb View Post
Here is the scenario:

Pick a long and quite steep downhill (say 5 degrees and more)
Accelerate to about 40-50 miles before downhill starts then just let car roll downhill in "D" (do not touch accelerator) - it will stay in 6th gear and just roll and will most likely accelerate due to the grade.

Try the same thing in "S" and car will downshift after about 5-10 secs into either 4 or in my case 3 gear (engine will obviously rev up) and will drive like this all the way down - it will perform automatic engine braking.


So the ? being is DCT behaving as designed or not? I asked dealership and was told it is but somehow/somewhere it still reeks of BS for me. This is just a regular car - I would understand engine braking programmed into heavy duty trucks' transmission but Focus?

Anyone else came across this or willing to try to reproduce it?

It's downshifting so you can accelerate quicker since you're on a sport mode
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Old 11-03-2013, 10:40 PM   #6
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Quote:
Originally Posted by dyn085 View Post
This x2. Performing as intended, whether we like it or not.
Wait what? It does not do this with CC on my car
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Old 11-03-2013, 10:53 PM   #7
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Quote:
Originally Posted by NickCornell View Post
Wait what? It does not do this with CC on my car
It does with mine on a long, steep hill...I have to cancel it to get it to stop. I understand the purpose, but it is so loud that it's embarrassing, like the transmission broke or something.

It did it coming back from a Mizzou game with my Dad - the look on his face was priceless. He thought the engine was going to blow up.
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Old 11-03-2013, 10:55 PM   #8
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If you're in CC with the car in select shift mode in 6th gear the car will absolutely not downshift
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Old 11-03-2013, 11:33 PM   #9
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First off, big trucks don't engine brake. At least, not like your car does. We're talking about an engine that is about to explode when it hits 3,000 RPM's and a TON of weight behind it. They do use 'jake brakes' though, which stay at the same RPM (no downshift needed) but use a series of valves to basically turn the engine into a giant (and noisy) air compressor to give it the resistance needed to actually slow the truck down and prevent overheating the brakes.

Second, in sport mode, it's not a normal car. Normal, every day driving is for normal, every day mode. Sport driving is for... well you can take it from here!

And yes, it's the way it's programmed, and for 'sport' driving, it's the way it SHOULD behave. Keeping the engine revs up and in the powerband so the power is there instantly, should you need it. Just hit the accelerator, and go.

Finally, engine braking is something people have done, even in small cars and even on motorcycles (nearly all motorcycles are manual transmission) for a long time. Personally, I think brakes are cheap and a piece of cake to change. BUT, some people like to engine brake. Engine braking is not generally to 'increase' your braking performance. The brakes applied to the drive wheels will stop a lot harder than the engine will. Engine braking is to ease up on your brakes. It IS useful on long, steep grades (like coming down a mountain), to keep your brakes from overheating and/or rotors from warping. If you select the right gear you should be able to maintain a more/less constant speed with minimal throttle inputs and no brake while going down a steep grade.
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Old 11-04-2013, 05:59 AM   #10
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Quote:
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If you're in CC with the car in select shift mode in 6th gear the car will absolutely not downshift
Sport mode, not select shift.
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