Disconnect start/stop function
Discussion
eybic said:
Permanently? No not legitimately as it would affect the emissions then in turn the taxation due.
You will be able to turn it off each time you start the car by pressing the button as has been suggested.
What a load of sYou will be able to turn it off each time you start the car by pressing the button as has been suggested.
t - cars are/were taxed on their emissions results in testing not once they are on the road.You can disable via Vcds for some cars it seems to depend on how integrated the system is to the platform (it appears to be harder/not possible on older platform cars). A VW coding expert on a vw forum would be able to confirm though
SteBrown91 said:
eybic said:
Permanently? No not legitimately as it would affect the emissions then in turn the taxation due.
You will be able to turn it off each time you start the car by pressing the button as has been suggested.
What a load of sYou will be able to turn it off each time you start the car by pressing the button as has been suggested.
t - cars are/were taxed on their emissions results in testing not once they are on the road.You can disable via Vcds for some cars it seems to depend on how integrated the system is to the platform (it appears to be harder/not possible on older platform cars). A VW coding expert on a vw forum would be able to confirm though
edit to add : well that didn’t take long, a quick read on briskoda revealed the push button as mentioned in this thread earlier, will disconnect the s/s function. Or unplug at the battery terminal. Sorted.
Edited by crankedup on Thursday 14th June 21:29
Our mk7 Golf GTI can’t be disabled without the button press every time by all accounts. We’ve got used to it now, but I do still sometimes manually deactivate if I know I’m doing a short run. Generally the system works well and if you are very light on the brake pedal it won’t cut the engine if you know you’ll barely be stopped in traffic. Only time it annoys me is the front of The queue at a roundabout
SteBrown91 said:
You can disable via Vcds for some cars it seems to depend on how integrated the system is to the platform (it appears to be harder/not possible on older platform cars).
You certainly can do some, I've (VCDS) coded my S4 so that stop/start remains in the state it was last in (i.e how it should be) so that I don't have to keep switching it off every time but can use stop/start if required.Some cars you can't do it but I understand there are 'workrounds' on most, e.g. even when it can't be switched off, you can change the voltage or temperature parameter at which it is disabled (stop/start auto disables if engine cold or battery voltage low) which 'fools' it into deactivating stop/start.
Assuming it's a manual (I know, it might not be!) - why would you want to permanently turn off the stop/start? The engine restarts as soon as you push the clutch pedal down, it really is (almost) instant. On a small petrol the restart isn't noticeably noisy either (a little more on a bigger diesel). It won't put the engine under (significantly) more strain - the cambelt / chain will have fallen apart on that engine first anyway.
On an auto, I understand some people have difficulty at junctions.
Actually - the cambelt / chain is a good thing to mention, that 1.2tsi engine had issues when it was launched, I don't know if the design changed by 2015 on the skoda, but listen carefully for rattles on cold starts.
On an auto, I understand some people have difficulty at junctions.
Actually - the cambelt / chain is a good thing to mention, that 1.2tsi engine had issues when it was launched, I don't know if the design changed by 2015 on the skoda, but listen carefully for rattles on cold starts.
tigger1 said:
Assuming it's a manual (I know, it might not be!) - why would you want to permanently turn off the stop/start? The engine restarts as soon as you push the clutch pedal down, it really is (almost) instant.
Much less of an issue on a manual, my Mrs has a manual Qashqai diesel with stop/start and when I modded mine to stay off if set to off she told me that hers hardly ever stops - I'm certain the reason for this is that she rides the clutch in traffic so it never gets a chance to activate... These guys turned it off on my T6 - https://www.advanced-incar.co.uk/
You can do it with Vag Can if you know somebody with a copy.
You can do it with Vag Can if you know somebody with a copy.
What exactly is the objection to it?
I had it on my Golf GT (manual) and I have it on my Golf R (DSG), and to be honest its use doesn't bother me.
In stop-start traffic in the Golf R, a light feathering of the brake pedal causes it not to activate and a firmer press causes it to activate. When I want the engine to start, a light touch on the throttle causes the engine to immediately spring back into life.
Yes, a button press will deactivate it for that journey. But why exactly would you want to?
The only time I will deactivate it is when wanting to pull out of a sideroad in heavy traffic and looking for a gap and needing to go the moment I see one. And the deactivation button is fine for that.
Edit: As catso says, on a manual it only activates when you shift into neutral when stopped, and it starts again as soon as you depress the clutch.
I had it on my Golf GT (manual) and I have it on my Golf R (DSG), and to be honest its use doesn't bother me.
In stop-start traffic in the Golf R, a light feathering of the brake pedal causes it not to activate and a firmer press causes it to activate. When I want the engine to start, a light touch on the throttle causes the engine to immediately spring back into life.
Yes, a button press will deactivate it for that journey. But why exactly would you want to?
The only time I will deactivate it is when wanting to pull out of a sideroad in heavy traffic and looking for a gap and needing to go the moment I see one. And the deactivation button is fine for that.
Edit: As catso says, on a manual it only activates when you shift into neutral when stopped, and it starts again as soon as you depress the clutch.
Adrian E said:
Generally the system works well and if you are very light on the brake pedal it won’t cut the engine if you know you’ll barely be stopped in traffic. Only time it annoys me is the front of The queue at a roundabout
We have it on both cars. On the LR (manual), It's really not intrusive at all. Engine stops when in neutral with clutch released. As soon as you dip the clutch to select a gear it starts. I don't see any downside.My S4 has DSG and stop/start. It takes a little bit of getting used to as the engine stops when you're stationary with the brake pressed hard, and starts again when you come off the brakes. However, you can easily come to a stop with the brakes gently on, so the engine keeps running. Similarly, you can lift of the brakes partially to restart the engine but still prevent the car crawling forwards. I've never felt the need to disable it even temporarily.
silentbrown said:
My S4 has DSG and stop/start. It takes a little bit of getting used to as the engine stops when you're stationary with the brake pressed hard, and starts again when you come off the brakes. However, you can easily come to a stop with the brakes gently on, so the engine keeps running. Similarly, you can lift of the brakes partially to restart the engine but still prevent the car crawling forwards. I've never felt the need to disable it even temporarily.
As is mine, however I find it annoying when pulling up to a junction where you need to go as soon as a space is available because it 'seems' to take too long to start, and in (my) normal driving any small amount of fuel saved is no doubt offset by extra wear & tear on the starter mechanism and battery. Plus, unless it has an electric and constantly running oil pump then I can't see how starting and then immediately accelerating an engine can be good for ensuring good lubrication of all moving parts?
catso said:
in (my) normal driving any small amount of fuel saved is no doubt offset by extra wear & tear on the starter mechanism and battery.
Plus, unless it has an electric and constantly running oil pump then I can't see how starting and then immediately accelerating an engine can be good for ensuring good lubrication of all moving parts?
Plenty of times the benefit is going to be minimal, but the real win is for urban pedestrians who don't have to put up with rows of stationary cars belching particulates as they wait at traffic lights.Plus, unless it has an electric and constantly running oil pump then I can't see how starting and then immediately accelerating an engine can be good for ensuring good lubrication of all moving parts?
I'd expect the oil supply system is designed to cope. It's not like your'e starting it with cold oil that's all gone gloopy in the sump, and has drained out of the pump.
silentbrown said:
My S4 has DSG and stop/start. It takes a little bit of getting used to as the engine stops when you're stationary with the brake pressed hard, and starts again when you come off the brakes. However, you can easily come to a stop with the brakes gently on, so the engine keeps running. Similarly, you can lift of the brakes partially to restart the engine but still prevent the car crawling forwards. I've never felt the need to disable it even temporarily.
Yep, same behaviour in our Golf GTI auto too - our S5 is too old to get stop-start, unfortunately. Could bloody well do with it given how much of a drink it likes!silentbrown said:
Plenty of times the benefit is going to be minimal, but the real win is for urban pedestrians who don't have to put up with rows of stationary cars belching particulates as they wait at traffic lights.
I'd expect the oil supply system is designed to cope. It's not like your'e starting it with cold oil that's all gone gloopy in the sump, and has drained out of the pump.
Maybe, but as oil is circulated around the engine whilst the engine/pump is running then, when the engine is running, the oil is already there in plentiful supply before the engine accelerates whereas after a start it needs to regain the pressure/flow. I'd expect the oil supply system is designed to cope. It's not like your'e starting it with cold oil that's all gone gloopy in the sump, and has drained out of the pump.
If I just boot the engine from a re-start it will inevitably have less than optimum oil circulation, worsened by the length of time it has been stopped. It maybe designed to 'cope' but it's not optimal from a mechanical POV and I highly doubt that the engineers would have chosen to design it this way were it not for legislation forcing them to do so. Things may have moved on from the old 'most engine damage done during the first few seconds' adage but there's surely still some truth in it?
And with all the extra strain on the engine/starter gear/battery etc. I wonder what extra future problems will arise 10 years down the road with all these stop/start vehicles.
As for the pollution, I doubt it makes much difference in my typical driving as I don't spend much time in city centre situations plus I also doubt a 5 second engine stop compensates for the inevitable extra fuel usage of another re-start?
Particulates, aren't they primarily a
Lean burning petrol engines generate particulate too - expect to see increasing numbers of particulate filters on gasoline engines as RDE emissions testing forces manufacturers to clean up their engines to work in a more representative range of conditions (note that'll still mean based on average temperatures for testing that we rarely see in the UK!)
There's no issues with starter motors etc - you'll usually find a combined starter/generator now, which is designed for a far heavier duty cycle than traditional components.
For those who don't sit in traffic it's clear stop-start offers no benefit, but for every one of those users there's 10+ that sit in traffic daily. Stop idling engines and you instantly cut emissions to zero - the effect on an already warmed up engine of restart is far less than what's been saved. It's true that it's only been fitted because of old emissions legislation, that had a ridiculous period of engine idling included, and it was a cheap solution to massaging your CO2 figures for taxation purposes and giving a lovely fuel economy figure in the brochure.
There's no issues with starter motors etc - you'll usually find a combined starter/generator now, which is designed for a far heavier duty cycle than traditional components.
For those who don't sit in traffic it's clear stop-start offers no benefit, but for every one of those users there's 10+ that sit in traffic daily. Stop idling engines and you instantly cut emissions to zero - the effect on an already warmed up engine of restart is far less than what's been saved. It's true that it's only been fitted because of old emissions legislation, that had a ridiculous period of engine idling included, and it was a cheap solution to massaging your CO2 figures for taxation purposes and giving a lovely fuel economy figure in the brochure.
Adrian E said:
For those who don't sit in traffic it's clear stop-start offers no benefit, but for every one of those users there's 10+ that sit in traffic daily. Stop idling engines and you instantly cut emissions to zero
Indeed. It may not benefit you personally that much, but it makes a massive difference to those around you. Not just in air pollution but in noise pollution too. Gassing Station | Audi, Seat, Skoda & VW | Top of Page | What's New | My Stuff