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SQ5 ECU vagaries

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Old 06-11-2014, 02:27 AM   #1
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Default SQ5 ECU vagaries

Hi folks My SQ5 has now done 10k insix months Love the car [ truck] but some lunatic who has obviously never driven in anger ie fast has written the ECU programme that when you Left foot brake as many do with automatic tranies the accelerator is '" inhibited "" and this cause a hesitation before the engine picks up agian.. this fine till you are doing a turn infront of a fast approaching truck !!! I do not need economy messages telling me I have the window open and the A/C on !! I know that I just opened the window. Where do they get these people If I have both feet on the pedals at tje same time I am aware of this.. The car casts me a minor fortune and 2-3 mpg will not break me , I hope Yours in hope This is supposed to be a drivers car Ralph S
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Old 06-11-2014, 05:42 AM   #2
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Perhaps the solution is to not have both feet on the brake and accelerator at the same time while the car is moving?
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Old 06-11-2014, 06:04 AM   #3
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Perhaps the solution is to not have both feet on the brake and accelerator at the same time while the car is moving?
Perhaps. But maybe you are not pushing the gas and brake hard enough?
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Old 06-11-2014, 06:12 AM   #4
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Hi folks My SQ5 has now done 10k insix months Love the car [ truck] but some lunatic who has obviously never driven in anger ie fast has written the ECU programme that when you Left foot brake as many do with automatic tranies the accelerator is '" inhibited "" and this cause a hesitation before the engine picks up agian..
You would have to know Audi's history in the US and the whole "unintended acceleration" fiasco that occurred in the 80s to understand why Audi did this. Back then people were inadvertently pressing both pedals with one foot, causing their Audi 5000 to accelerate when they didn't want it to. It was a user error, but to prevent this from happening, Audi changed the programming so that when brake press is detected, throttle is automatically cut, whether you're pressing the accelerator pedal or not. I suppose that is what you're observing.
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Old 06-11-2014, 06:53 AM   #5
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You would have to know Audi's history in the US and the whole "unintended acceleration" fiasco that occurred in the 80s to understand why Audi did this. Back then people were inadvertently pressing both pedals with one foot, causing their Audi 5000 to accelerate when they didn't want it to. It was a user error, but to prevent this from happening, Audi changed the programming so that when brake press is detected, throttle is automatically cut, whether you're pressing the accelerator pedal or not. I suppose that is what you're observing.
Toyota/Lexus started using the throttle override system in their cars after the unintended acceleration fiasco. I believe it's becoming pretty common these days.
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Old 06-11-2014, 07:49 AM   #6
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Passenger cars should always be driven with one foot right ?

Use only right foot and all will be good...and put it in Dynamic if you want quick response.
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Old 06-11-2014, 08:42 AM   #7
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Those who say cars should always be driven with 1 foot have obviously never watched WRC/Rally Racing. It's possible to do some pretty amazing things at ridiculous speeds if you know what you're doing. Whether the SQ5 is the right car to be doing so is left to the individual to decide.

I happen to agree w/the OP that this is lowest common denominator, nanny-ism run amuck.
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Old 06-11-2014, 09:26 AM   #8
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With so many people ready to sue anyone at anytime at the drop of a hat, these nannies aren't going away anytime soon. To a certain degree, I can see the automakers erring on the side of caution.
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Old 06-11-2014, 09:50 AM   #9
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Those who say cars should always be driven with 1 foot have obviously never watched WRC/Rally Racing. It's possible to do some pretty amazing things at ridiculous speeds if you know what you're doing. Whether the SQ5 is the right car to be doing so is left to the individual to decide.
Don't those rally drivers mostly use the other foot for the clutch?
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Old 06-11-2014, 10:09 AM   #10
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Those who say cars should always be driven with 1 foot have obviously never watched WRC/Rally Racing.
And how many of those WRC cars are actually street legal?

Q5 was designed to be a soccer mom mobile, not some stunt car.

As the other poster noted, we are a very litigious society where people are quick to blame a rich corporation for their own stupidity, and for this reason, Audi and other manufacturers are going to install more and more nannies in their street cars. The alternative would be very costly.
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Old 06-11-2014, 01:28 PM   #11
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If driving like this is important to you why didn't you check this on your test drive?
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Old 06-11-2014, 07:31 PM   #12
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<<<@!1!@>>>

No. Clutch is barely necessary today. They use left foot nearly exclusively for braking.

This video is old, but the first I found
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Old 06-12-2014, 05:52 AM   #13
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Under normal driving conditions, you should only drive with one foot.

Comparing driving on public roads to driving a rally car off road in a race is just silly.
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Old 06-12-2014, 06:58 AM   #14
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Under normal driving conditions, you should only drive with one foot.

Comparing driving on public roads to driving a rally car off road in a race is just silly.
True enough. For those who feel that that their car should be driven on public roads like in a rally race, they should find a better place to put that second foot.
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Old 06-12-2014, 07:35 AM   #15
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You guys.... LOL. Nobody here is suggesting that anyone drive like that on public roads. It always amuses me how one's personal experience limits the view to potential use by others.

All I was saying is that left foot braking is a legit technique. ...Even for straight-up track use (not just WRC) to adjust balance and weight transfer in corners and such.

Nowhere do I expect a "soccer mom" would (or maybe should...) drive rally style on the way to dropping the kids at practice. But... the SQ5 specifically, and one could argue the Q5 in general, is advertised and directed as a handling, alternative use vehicle. People will, have, and currently are going to take these things to the track despite maybe being imperfect in many ways for track use. For that, Stability control, overly strict traction control, prohibited use of controls in general, is a nuisance. Selling a 60k vehicle as a slightly oversized pocket rocket, capable of smoking all others in class, and then hampering it's ability to be same is what's called in to question.
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Old 06-12-2014, 07:58 AM   #16
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Haha, you can accelerate faster than a some vehicules, and then brake harder than some...but can't do both at the same time vs others ;-)

My conclusion to this story.

Funny though that they electronically shutter the gas
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Old 06-12-2014, 10:41 AM   #17
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People will, have, and currently are going to take these things to the track.
Well, proper track rats often have their ECU programming reflashed to suit the track needs better. Maybe there is a tuner out there who can figure out how to reprogram Q5's ECU to get rid of some of these nannies.
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Old 06-12-2014, 10:53 AM   #18
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Well, proper track rats often have their ECU programming reflashed to suit the track needs better. Maybe there is a tuner out there who can figure out how to reprogram Q5's ECU to get rid of some of these nannies.
Yep. APR and GIAC tunes already get rid of it so there you go!

From APR on the 3.0T tune:

"Left Foot Braking:
APR's Left Foot Braking feature allows more control over the vehicle’s throttle. The factory equipped vehicle's throttle input is disabled while pressing the accelerator and brake at the same time. Left Foot Braking, a common motorsport driving technique, allows the driver complete control over the vehicle’s throttle and braking system, which may give the vehicle the edge it needs at the track. "
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Old 06-12-2014, 10:56 AM   #19
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Perfect! Sounds like that's what the OP is looking for.
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Old 06-12-2014, 04:12 PM   #20
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My SQ5 allows me to power-break for launching. Is it just the regular Q5's that experience this issue?
On another note; I understand the litigiousness, but why can't soccer mom leave it in comfort mode, where it should be disabled, and not in dynamic mode?
I also understand the foot issue. I always only use one foot, but I do use my left for the brake on the track. Although, I haven't had the SQ5 on the track...gotta try it.
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