AH FabricationsSky Insurance
Results 1 to 19 of 19
  1. #1
    1st Gear

    Status
    Offline
    Join Date
    Jan 2007
    Location
    Zrich
    Posts
    56

    Glow Plugs / Cold Weather

    Does anybody know if it is inadvisable to crank the engine before the glow-plug light has gone out? I notice that often in cold weather if I just turn the key all the way around and foget to watch / wait for the glow plug light to extinguish then the engine will still start cranking immediately even though the glow light is on. I would assume that if this would do any damage then the starter motor would be disabled until ready? Any ideas?

    Mark.

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Rev-head's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Oct 2004
    Location
    Perthshire
    Posts
    2,955
    Wont do any harm as i do this myself.......first thing in the morning i will wait but after that i just turnover
    Urq RR
    S2 Coupe...RS2 +
    S2 Avant (slipper wagon spec)
    A4 AVANT TDI

  4. #3
    Amchlolor's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2005
    Location
    Aberdeen
    Posts
    5,602
    I only wait first thing in the morning too.
    Rest of the time I don't bother.
    '02 to '05 - Black Audi A4 1.9tdi sport
    '05 to '08 - Akoya Silver A3 sportback S-line DSG
    '08 to ? - Black Alpina D3

  5. #4
    icenutter's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Jun 2006
    Posts
    595
    Doesn't do any harm - your engine might not start promptly if you don't - but I guess you could work that out yourself.

  6. #5
    wilko's Avatar
    Top Gear

    Status
    Offline
    Join Date
    Feb 2005
    Location
    Nottingham (UK)
    Posts
    724
    I thought that was the whole point of the light - wait til it's warm then start the car!
    A3 2.0 TDI Sport in Akoya Silver - with... Black Alcantara, Black Headlining, Aluminium Inlay's, Interior Light Pack, Storage & Luggage Pack, Front Armrest, Electronic Climate Control, Non-smoking Pack, First Aid Kit & Warning Triangle, Electric Sunroof, Heated/Folding Door Mirrors, Sony CDX-GT930UI with USB iPod Connector & BOSE, 17" '5 Spoke Star' Alloys, Light & Rain Sensors, Xenons, Vortex Rear Spoiler, GTI Aluminium Pedals & Black Brake Callipers!

  7. #6
    Amchlolor's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2005
    Location
    Aberdeen
    Posts
    5,602
    Quote Originally Posted by wilko
    I thought that was the whole point of the light - wait til it's warm then start the car!
    I'm sure there are umpteen procedures we are 'supposed' to stick to.
    I know one of my wife's cars (can't remember which one) used to say you were supposed to wait for myriad of lights to go out before you turned the key.
    All sorts of 'system checks',like it's bloody Battlestar Galactica.
    Horlicks to that,just start the fecker.
    '02 to '05 - Black Audi A4 1.9tdi sport
    '05 to '08 - Akoya Silver A3 sportback S-line DSG
    '08 to ? - Black Alpina D3

  8. #7
    benw123's Avatar
    Moderator

    Status
    Offline
    Join Date
    Oct 2004
    Location
    Herts, UK
    Posts
    1,863
    I usually also wait for it to disappear, but even in very cold weather it only seems to stay lit for a second or two.
    2004 A3 Sportback 2.0TDI SE, RNS-E Sat Nav SW0650 TMC, 17" Star Alloys, Xenons, DIS, Rear Mats & Sunblind, Alu trim, Ebony Black pearlescent
    2006 Honda Accord EX i-CTDI, Arctic Blue, Leather, Sat Nav, XCarLink

  9. #8
    5th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Posts
    1,139
    the glow plugs are rapid at preheating so they are very fast at getting hot so literally by the time you switch them on they are hot enough to start the car. i always used to start the car as if it were a petrol and it always started on the immediately - only thing i noticed when really cold is it would start but it would stumble a little as it started but once it got going it was fine.

    I rememember when i had a 406 diesel and that just would not start unless you left the preheat light on and turned the key immediately it went out

  10. #9
    wilko's Avatar
    Top Gear

    Status
    Offline
    Join Date
    Feb 2005
    Location
    Nottingham (UK)
    Posts
    724
    My 306 Turbo Diesel was the same!! Must be a Pug thing!
    A3 2.0 TDI Sport in Akoya Silver - with... Black Alcantara, Black Headlining, Aluminium Inlay's, Interior Light Pack, Storage & Luggage Pack, Front Armrest, Electronic Climate Control, Non-smoking Pack, First Aid Kit & Warning Triangle, Electric Sunroof, Heated/Folding Door Mirrors, Sony CDX-GT930UI with USB iPod Connector & BOSE, 17" '5 Spoke Star' Alloys, Light & Rain Sensors, Xenons, Vortex Rear Spoiler, GTI Aluminium Pedals & Black Brake Callipers!

  11. #10
    Amchlolor's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2005
    Location
    Aberdeen
    Posts
    5,602
    See what really bugs me about starting my car...
    When you turn the ignition on,the radio/cd will come on instantly.
    That's fine,no problem with that.
    However,when you turn the key further,to actually start the car,the radio goes off and takes a bloody age to come back on again.
    Maybe peculiar to Bose,I dunno.
    '02 to '05 - Black Audi A4 1.9tdi sport
    '05 to '08 - Akoya Silver A3 sportback S-line DSG
    '08 to ? - Black Alpina D3

  12. #11
    treblesykes's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Nov 2004
    Location
    york
    Posts
    688
    same in a freelander radio doesnt come back on untill youve nearly got to where you are going

  13. #12
    1st Gear

    Status
    Offline
    Join Date
    Jan 2007
    Location
    Zrich
    Posts
    56
    I also wait always for the light to go off, but usually the Missus doesn't remember to do that. The only thing that worries me is unspent fuel might damage the cat or particle filter if there is too much cranking as a result. Although I assume that if this was an issue then Audi would have disabled the starter motor until ready.

    Unlikely to be a big issue since here we havent seen much cold weather yet, but the forecast is for -10 during the next few days, so we will see.
    -----
    Audi A3 Sportback SP, 2006
    2.0 TDI

  14. #13
    Amchlolor's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2005
    Location
    Aberdeen
    Posts
    5,602
    I'll sum up the difference between a company car and a bought-and-paid for car right here.

    My car,hardly bother waiting for the light.
    Wife's car,it's drummed into her head to WAIT FOR THE LIGHT TO GO OUT !

    :-)
    '02 to '05 - Black Audi A4 1.9tdi sport
    '05 to '08 - Akoya Silver A3 sportback S-line DSG
    '08 to ? - Black Alpina D3

  15. #14
    1st Gear

    Status
    Offline
    Join Date
    Jan 2007
    Location
    Renfrewshire
    Posts
    118
    i was under the impression that the glowplug's came on when when you opened the door because it reakons you are going to start the engine??
    Any thoughts on this guys? it would explain the very quick heating eg 1 second!

    My works van is a astra and if you dont let the plugs do its thing it will turn over for 30-45secs before it starts
    A4 Avant 2.0tfsi S-Line Quattro 2010, Misano Red, thinking about bluefin when i have the cash

  16. #15
    S6 avant

    Status
    Offline
    Join Date
    Oct 2006
    Location
    bewdley Worcestershire
    Posts
    689
    my 1.9 tdi used to start straight away, never used to wait for the light.
    2000 s6 avant, special order met, green, satnav, Bose, tv, solar roof, privacy glass, recaro silver nappa.

  17. #16
    OutLore's Avatar
    VOIP Dude

    Status
    Offline
    Join Date
    Oct 2003
    Location
    Essex, UK
    Posts
    1,183
    I don't think Audi would stop the starter motor from turning until the light was out. Imagine how many duff calls they would get to the 24hr assistance line if they did...
    Spence
    ________________________________________
    Now: 2011 A4 Avant 2.0TDi Black Edition Multitronic Aruba Blue
    Gone at 77k: 2008 A4 Saloon 2.0TDi 140 S-Line Quartz Grey

    Gone at 80k: 2007 A3 Sportback 2.0T S-Line S-Tronic Mauritius Blue
    (4 S-Tronic boxes, 3 Mechatronics Units, 2 Dual Mass flywheels, 2 sets of engine mounts)
    Gone at 32k: 2005 A3 Sportback 2.0TDi 140 S-Line DSG
    Ebony Black

  18. #17
    Caesium's Avatar
    My BM is fixed!

    Status
    Offline
    Join Date
    May 2004
    Location
    Hertfordshire
    Posts
    4,858
    The glow plugs heat up fairly quickly but its the compression of the air that ignites the fuel, the plugs don't get red hot instantly, and the light is not an indictation of when the plugs stop functioning, they stay on for about a minute, normally to burn off the crud.

    Not waiting for the light to go out, especially in high mileage cars can put excessive load on the battery due to the starter motor having to crank for longer. Its doubtful that any of this would damage the engine though.
    Chris

    The problem with common sense, is that its not that common.

    See my images @
    http://www.christianfrench.co.uk

    Own a dreaded BMW? http://www.bmw-sport.net

  19. #18
    TDI-line's Avatar
    Uber Post Whore

    Status
    Offline
    Join Date
    Oct 2004
    Location
    Peterborough
    Posts
    8,885
    Always wait for the light to go off, and if extremly cold will turn on/off a few times.

    2013 AUDI A3 SB S-LINE : 2.0 TDIQ 184 : GLACIER WHITE :
    : S-TRONIC : COMFORT PACK : SD SAT NAV : FOLDING MIRRORS : HEATED SEATS: RIGID BOOT LINER :

  20. #19
    5th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Posts
    1,139
    well i never had any probs with mine just literally turning my key from off straight too 3 - just as if it were a petrol and it started immediately every single time - at the end of the day if it starts it starts - its not going to do any harm to anything by not letting the glow plug light go out.

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO