How long do your gloplugs stay on for?

Discussion in 'The Beginner' started by jimothy, Dec 13, 2012.

  1. jimothy

    jimothy Read Only Funster

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    I fired up MoHo last night, and it took a good 10 mins or more before the gloplug light went out. Fired first time after the light had gone. But it seemed ages to me.

    My only previous experience of diseasel was my old Octavia, and even in the harshest of winters the light maybe hung around for 5 seconds or so.

    Is such a long time normal?

    Merci beaucoup

    Jamie.


    :BigGrin::BigGrin: MoHo-ho-ho Merry Christmas :BigGrin::BigGrin:
     
  2. hilldweller

    hilldweller Funster Life Member

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    Light for 5 secs, but listen carefully and you hear the relay drop after about 20 secs.
     
  3. buttons

    buttons Funster

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    How long does it stay on once the engine is at operating temperature. If it was cold and little used then 20 secs sounds ok to me. :thumb:
     
  4. jimothy

    jimothy Read Only Funster

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    So should normally be a matter of seconds, rather than the several minutes it took last night then?

    Why would it be so long? Knackered plugs? It was bloody cold mind you.


    Once the engine had run for a bit, if I turned it off, and restarted, the light was on only for a second or two.
     
    Last edited: Dec 13, 2012
  5. hilldweller

    hilldweller Funster Life Member

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    We need Geo or our Diesel Doctor to comment here.

    In my limited experience, just seconds, under a minute.
     
  6. pablomc

    pablomc Funster Life Member

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    Interesting post. On my previous van 2.3 it only stayed on when the ignition was first turned on, never when the vechile was running.

    Starting our current vehicle least week when it was very cold (older 2.8), it stayed on after starting. Checked the manual, but no real mention of it. Also never seen it come on during warmer weather.

    Doing a little research I wonder if mine actually is a thermostarter which seems to fit the description.

    Would be good to hear an expert explanation. :thumb:
     
  7. Spacerunner

    Spacerunner Read Only Funster

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    Started mi 2.3 yesterday after three weeks standing, temperature about 3 degrees.
    Glow plug was on about 3-4 seconds......the longest its ever been on.
    Usually its so quick I miss it!
     
  8. jimothy

    jimothy Read Only Funster

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    Just to clarify (my initial description was not entirely precise :BigGrin: !) - the gloplug light stays on for several minutes after I turned the ignition on, but before I've started the engine.

    Once the light had gone out, I cranked the engine.

    The light doesn't stay on once the engine is running.

    I will be doing it again this evening in preparation for the weekend's trip out, so will see how long it lights for this time...
     
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  9. Mel

    Mel Funster

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    On our Mercedes Viano this is the indication that a glowplug has failed {one or more.}
     
  10. hdvrod

    hdvrod Read Only Funster

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    Mercedes sprinter here 2 or 3 secs regarless of weather.
     
  11. spannermanwigan

    spannermanwigan Read Only Funster

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    Would help if you told us which base vehicle you have and which engine.

    you dont normaly with modern engines need to wait until heater plug light goes out before, engine should start easily after about 20 seconds of switching ignition on.

    regards
    Steve
     
  12. jimothy

    jimothy Read Only Funster

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    It's a 2.5 Ducato, 1996 vintage.
     
  13. Snowbird

    Snowbird Funster Life Member

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    Is that turbo or naturally aspirated. If it non turbo, it will stay on for anything up to 30 seconds. If its turbo then 20 seconds max. Anything longer like in your OP 20 minutes and something is seriously wrong. Glowplug or relay on its way out/or already gone.
     
  14. 1948

    1948 Read Only Funster

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    It would depends on the gaps between use if it no been used a few days and outside temp is below zero itwould be normal for glow plug light to go off for 20sec or so before you start If it take more than a few sec for the glowplug light to go off when temp is above zero then I would say it is not normal To give you an idea, my van was not used for 3 days and IT WAS - 10c the last
    time I started the van it took around 30 sec before the glow plug went off
    Happy touring
     
  15. jimothy

    jimothy Read Only Funster

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    2.5 TD. :Sad:


    I give it another go when I get home. Normally starts fine, and it's not like it's been stood for a while, we were last out in it last week. Hoping the weather warms up a little for the weekend so cold starting not a worry!

    Either that or a can of [ame="http://www.youtube.com/watch?v=cY1YndLmbXQ"]Wynn's[/ame] :Wink:
     
  16. rainbow chasers

    rainbow chasers Read Only Funster

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    It could be that your plugs are worn, so are taking longer to heat up. They are not expensive, and easy to replace. It may take a little longer on colder days, but not that long!:thumb:
     
  17. sedge

    sedge Funster

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    Not being at all technically mided, you know how you can clean up spark plugs and earth em and see if they work LOL - no I wouldn't do it but have watched whilst other folk did it, many times! - can you actually have gloplugs tested or DIY to see if its them or whether you need to look for other reasons or do you just have to pay to replace them - then find ages after when the prob still hasn't been cured, that it's summat entirely different causing it?
     
  18. mitzimad

    mitzimad Funster

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    you can test for resistance a bit of research would give a figure for healthy ones
    continuity test to earth usually once burnt out you get no path to earth
     
  19. Jaws

    Jaws Funster Life Member

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    Number ones sons Merc ( 1996 chassis ) takes a good minute and always has.. But ten minutes ? Naaaa.. First thing I would check is the battery voltage when cold and turned on.
    Might have a shorted plate or two.. Would still crank over ( if a little slowly ) but would take yonks for the plugs to reach heat.

    Replacing the plugs is usually quite an easy job if somewhat fiddly, and can be changed with fairly basic tools :thumb:
     
  20. jimothy

    jimothy Read Only Funster

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    Thanks ALL. :Smile:

    My second experiment resulted in the light on for 6 minutes before I got bored. So I turned off the ignition, then immediately turned it back on and the glowplug light did a much better couple of seconds then off. Started fine.

    Interestingly, on the first try I detected no clunk of the relay. On the second try the relay made a satisfying click - maybe relay is on its way out?


    We were away at the weekend first Brighton then up to Leicester, and no glowplug problems all weekend, I guess because it was that little bit warmer.
     
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