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  • FIRST POST
    • kpwll
    • By kpwll 18th Jul 14, 10:06 PM
    • 3,789Posts
    • 11,941Thanks
    kpwll
    stop/start
    • #1
    • 18th Jul 14, 10:06 PM
    stop/start 18th Jul 14 at 10:06 PM
    Can you please tell me if you can turn off or over-ride a stop/start facility on any/all cars with this function? Thank you.
Page 2
    • motorguy
    • By motorguy 19th Jul 14, 10:03 AM
    • 19,668 Posts
    • 12,335 Thanks
    motorguy
    Here's my guess:


    Given that with modern technology and appropriately-specified components (mainly battery capacity, alternator power and starter motor durability) there is no reason not to have stop/start ...


    ...except that for over 100 years, the main worry about having a car is 'will it start?' Adverts still contain lines like 'starts first time', which with modern machinery should be fairly redundant. Deliberately stopping the car in traffic seems to go against a century of motoring wisdom. I think it will take a while for this to be overcome.


    And not necessarily Luddite, either: the whole stop/start thing depends on the engine being in a perfect state of tune, and when a car is new it is brilliant. But after 100k miles, with worn injectors, bores, valves etc, will it be such a good idea? For use in traffic, the re-start must be instant. A car that has to churn on the starter for a few seconds, as many older cars do, would be a liability if it did that a hundred times a day in city traffic. I can see why people are not keen.
    Originally posted by Richard53
    Older diesel cars tend to churn when cold if compression is low, fuel pump weak, or heater plugs knackered. It does tend to be a "cold start" issue though, so once the car is warm its usually fine all day, hence the "taking several seconds to restart in city traffic" scenario is unlikely to happen.

    Also, stop start has been around for years now - and there are many around with 100-200K+ miles on them with no real issues.

    If badly worn engines / injectors / pumps / heater plugs on older cars were to cause stop / start problems - god forbid that people might have to actually maintain their cars - i'm sure the function can be programmed out of the ECU if needs be.
    Life has never given me lemons.

    It has given me anger issues, anxiety, a love for alcohol and a serious dislike for stupid people, but not lemons.
    • nearlyrich
    • By nearlyrich 19th Jul 14, 10:08 AM
    • 13,335 Posts
    • 16,542 Thanks
    nearlyrich
    Current and last car both have/had Stop/start both automatics so it just stops funny thing is if your foot moves at all it starts up so sometimes comes as a surprise. It can be disabled but I hate filling up so anything that delays the chore is great by me.
    Free impartial debt advice from: National Debtline or Stepchange[/CENTER]
    • facade
    • By facade 19th Jul 14, 10:14 AM
    • 4,098 Posts
    • 2,220 Thanks
    facade
    Most likely the stop/start will be automatically disabled if the air-con is on max cold.
  • topdaddy
    I'm probably going to get shot down in flames for this but I have to wait between 10 & 20 mins for them to come out of school and due to illness do not tolerate cold or getting chilled very well. I will add that I do feel guilty when keeping the engine running.
    Originally posted by kpwll
    The type of work I do can mean sitting idling for a long time in situations where you would want the heater running. All the stop starts I have had had had a button to disable it although these are mostly VAG cars
    • Stoke
    • By Stoke 19th Jul 14, 11:02 AM
    • 3,102 Posts
    • 3,525 Thanks
    Stoke
    Here's my guess:


    Given that with modern technology and appropriately-specified components (mainly battery capacity, alternator power and starter motor durability) there is no reason not to have stop/start ...


    ...except that for over 100 years, the main worry about having a car is 'will it start?' Adverts still contain lines like 'starts first time', which with modern machinery should be fairly redundant. Deliberately stopping the car in traffic seems to go against a century of motoring wisdom. I think it will take a while for this to be overcome.


    And not necessarily Luddite, either: the whole stop/start thing depends on the engine being in a perfect state of tune, and when a car is new it is brilliant. But after 100k miles, with worn injectors, bores, valves etc, will it be such a good idea? For use in traffic, the re-start must be instant. A car that has to churn on the starter for a few seconds, as many older cars do, would be a liability if it did that a hundred times a day in city traffic. I can see why people are not keen.
    Originally posted by Richard53
    The 3L I drove had 170k miles on it. The stop start worked perfectly.
    • Stoke
    • By Stoke 19th Jul 14, 11:03 AM
    • 3,102 Posts
    • 3,525 Thanks
    Stoke
    117mpg form a 3L? My 3L Supra did about 20mpg, less when I was booting it....happy days. What I'd give to get 20 mpg these days.

    I am guessing 0.3l? Which car was it Stoke?
    Originally posted by worried jim
    3L doesn't mean 3.0 litre. It means 3 litres per 100 km and that was the official figure. When taken on the road, the world record was set when someone drove across Europe and reached an average of 117 mpg, driving the entire way on less than 100 euros of diesel. That remains in the Guinness World Records... to this day.

    It's a Volkswagen Lupo 3L. Google it.
  • 4743hudsonj
    Here's my guess:


    Given that with modern technology and appropriately-specified components (mainly battery capacity, alternator power and starter motor durability) there is no reason not to have stop/start ...


    ...except that for over 100 years, the main worry about having a car is 'will it start?' Adverts still contain lines like 'starts first time', which with modern machinery should be fairly redundant. Deliberately stopping the car in traffic seems to go against a century of motoring wisdom. I think it will take a while for this to be overcome.


    And not necessarily Luddite, either: the whole stop/start thing depends on the engine being in a perfect state of tune, and when a car is new it is brilliant. But after 100k miles, with worn injectors, bores, valves etc, will it be such a good idea? For use in traffic, the re-start must be instant. A car that has to churn on the starter for a few seconds, as many older cars do, would be a liability if it did that a hundred times a day in city traffic. I can see why people are not keen.
    Originally posted by Richard53
    My Octavia is just shy of 110k and it starts immediately. Cars have been built better and stronger.
    Back by no demand whatsoever.
    • Financallychallenged
    • By Financallychallenged 19th Jul 14, 2:43 PM
    • 16 Posts
    • 4 Thanks
    Financallychallenged
    Highway Code requires the driver to be in control of the vehicle at all times. How does this stack up with stop/start?
    • daveyjp
    • By daveyjp 19th Jul 14, 2:56 PM
    • 8,478 Posts
    • 7,110 Thanks
    daveyjp
    Highway Code requires the driver to be in control of the vehicle at all times. How does this stack up with stop/start?
    Originally posted by Financallychallenged
    Sitting in a car without the engine running isn't an offence. I am still sat behind the wheel, so how am I no longer in control?
  • topdaddy
    Highway Code requires the driver to be in control of the vehicle at all times. How does this stack up with stop/start?
    Originally posted by Financallychallenged
    It comes on when the brakes are applied. Complete control is mainntained at all times unless you come off the brakes in neutral and do not apply the hand brake.
    • ali-t
    • By ali-t 19th Jul 14, 5:44 PM
    • 3,739 Posts
    • 6,328 Thanks
    ali-t
    The Volvo v40 has a button to switch stop start off.
    If you always do what you have always done, you will always get what you always got!
    • motorguy
    • By motorguy 19th Jul 14, 5:48 PM
    • 19,668 Posts
    • 12,335 Thanks
    motorguy
    The type of work I do can mean sitting idling for a long time in situations where you would want the heater running. All the stop starts I have had had had a button to disable it although these are mostly VAG cars
    Originally posted by topdaddy
    Doesnt matter. The car will restart when it cant keep the heater at the setting you have it at anyway.
    Life has never given me lemons.

    It has given me anger issues, anxiety, a love for alcohol and a serious dislike for stupid people, but not lemons.
  • topdaddy
    Doesnt matter. The car will restart when it cant keep the heater at the setting you have it at anyway.
    Originally posted by motorguy
    What? The heater runs of the engine heat and wont circulate without the engine running.
    • atrixblue.-MFR-.
    • By atrixblue.-MFR-. 19th Jul 14, 6:08 PM
    • 6,705 Posts
    • 4,644 Thanks
    atrixblue.-MFR-.
    My kia proceed EcoDynamic has stop start tech, it has a button to deactivate it permenantly just to the right of the drivers side dash with the light adjustment and cabin light adjustments are. It wont come on with the demisters are (when activated) or when the aircon used climate control is on. it wont come on when the vehicle is regenerating DPF, and it wont come on when the vehicles engine is not upto temp.
    • motorguy
    • By motorguy 19th Jul 14, 6:34 PM
    • 19,668 Posts
    • 12,335 Thanks
    motorguy
    What? The heater runs of the engine heat and wont circulate without the engine running.
    Originally posted by topdaddy
    Latent heat in the water system.

    Once the car drops below a cabin temperature the car will restart.
    Life has never given me lemons.

    It has given me anger issues, anxiety, a love for alcohol and a serious dislike for stupid people, but not lemons.
  • topdaddy
    Latent heat in the water system.

    Once the car drops below a cabin temperature the car will restart.
    Originally posted by motorguy
    Heat retained by passing an air flow over the coolant? the heater doesnt work when the engines off
    • motorguy
    • By motorguy 19th Jul 14, 7:27 PM
    • 19,668 Posts
    • 12,335 Thanks
    motorguy
    Heat retained by passing an air flow over the coolant? the heater doesnt work when the engines off
    Originally posted by topdaddy
    *sigh*

    The car is at a certain temperature with the heater on, right?

    With the engine off in stop / start mode the fans will continue to run.

    Once the car can no longer sustain that temperature when the car has switched off due to stop / start, it will restart the car.

    That may take a minute, it might take 10 minutes. There will of course be hot water in the water system - you do know it doesnt cool down instantly, dont you? So it will use what latent heat remains in the cooling system in the mean time.

    You'd have been one of those people who laughed when it was first suggested the world was round wouldnt you?
    Last edited by motorguy; 19-07-2014 at 7:29 PM.
    Life has never given me lemons.

    It has given me anger issues, anxiety, a love for alcohol and a serious dislike for stupid people, but not lemons.
    • jaydeeuk1
    • By jaydeeuk1 19th Jul 14, 7:47 PM
    • 7,454 Posts
    • 4,942 Thanks
    jaydeeuk1
    Stop start won't work in an iq if the windscreen demister button is on, even if fan isn't on. The off button is a temporary off function, next journey it will be on by default.


    Aircon will switch off when stopped.


    Over 5 years / 36k miles, stop start has turned the engine off for 28 hours 20odd minutes as pf this afternoon, so a fair bit of petrol saved and fewer squirrels killed to death.
    • forgotmyname
    • By forgotmyname 19th Jul 14, 11:02 PM
    • 29,563 Posts
    • 12,159 Thanks
    forgotmyname

    Over 5 years / 36k miles, stop start has turned the engine off for 28 hours 20odd minutes as pf this afternoon, so a fair bit of petrol saved and fewer squirrels killed to death.
    Originally posted by jaydeeuk1
    Little light hearted thoughts....

    How much extra fuel have you used carrying the extra weight of the stop start system

    Answer 1 = Not as much as carrying my sandwich box?

    Answer 2 = More than a Big Mac meal?

    Answer 3 = More than its saving
    Punctuation, Spelling and Grammar will be used sparingly. Due to rising costs of inflation.

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    • Gloomendoom
    • By Gloomendoom 19th Jul 14, 11:56 PM
    • 15,988 Posts
    • 22,367 Thanks
    Gloomendoom
    Little light hearted thoughts....

    How much extra fuel have you used carrying the extra weight of the stop start system

    Answer 1 = Not as much as carrying my sandwich box?

    Answer 2 = More than a Big Mac meal?

    Answer 3 = More than its saving
    Originally posted by forgotmyname
    How much does software weigh?
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