Diesel cold starting??

[dh.dti]

Sounds like you could have a faulty temp sensor

[bigbnlr]

my light doesnt come on until its below 5. Can be a pig to start at about 9 but if its below 5 it starts first pop

[Big Knox]

After 5 hrs in the cold my glowplug light don't come on

If your car has been run on that day, the core of the engine will say warm for a long time. I've seen it where my glowplug light comes on first time I start it and subsequent starts that day it doesn't because its still warm enough inside.

[Maverick]

The glow plug light should appear briefly when starting the ignition (not the engine), even on a warm engine
Equally, the colder it is the longer it should stay on

I would expect to see it for at least 0.5 seconds, increasing to 1.5 seconds when below -5'C

Thats true, many poeple don't notice as it's only on very briefly.

might be overkill but I turn ignition and and off 2-3 times depenting on how cold it it each time waiting till coil goes out to ensure glow plugs are fully heated,

There is not real point in doing that, the system is designed to heat the glow plugs very quickly as M8Internet said.

Doing it again and again won't inprove anything.

I started mine yesterday morning when it was -5 and the car had not been used for 2 days, let the light go out and after a few seconds she fired stright up. But I know if I tred to start it straight away it would have taken alot longer.

[bigmac]

If your car has been run on that day, the core of the engine will say warm for a long time. I've seen it where my glowplug light comes on first time I start it and subsequent starts that day it doesn't because its still warm enough inside.

Mine only come's on in morning and even if i leave it till late night time in this freezing cold with ice all over it the glowplug light wont come back on not even for a millisecond

[Maverick]

I think the biggest problem these days is that diesel engines have come so far in development that they are pretty instant in starting, not like older diesels where you have to wait for the light to go out.

But as soon as the cold weather arrives and the glow plugs take a few seconds to go out, owners start to think there is a problem.