Battery condition? I used to "cycle" the glow system two or three times before cranking. In other words when glow finishes, turn key off then start the glow cycle again. Get a crankcase or block heater. To warm up or "keep" warm. Glow almost never fails.
But it's possible the Glow timer or connections are going.
There are "Cetane" improvers that may improve cold starting. Quality of fuel you are getting? Last time Filter was changed? Really cold? and stuck. Only for emergency, not recommended. Ether cold start spray can. Spray into the air intake. You may need to open Air filter passage to spray. I knew a farmer who had an automatic ether system. Blue up the engine from over speed. So that is why you need to be careful!
I had the same problem fitted an extra battery and problem solved,don't even glow plugs now it just fires up straight away
i had the same problem and it was the crankshaft sensor not seated properly ,took it out sanded around to take off the rust took the washer out and used sealant to reseat and the problem was solved now starting a treat
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SOURCE: hard to crank when cold
I agree that either the glow plugs are burnt out or the controller is defective, as a Ford delaer technician I replaced the glow plugs as a set and also the controller, otherwise the trucks cam right back with more glow plugs burnt out.
SOURCE: 2003 Dodge Ram 3500 Diesel hot and cold start issues without plug
your glow plugs not working or glow plug relay or controller not working.
SOURCE: 2002 Volkswagon Jetta won't start in cold weather
I had a similar problem with my older 2000 model jetta 1,9TDi and also with my current 2002 1,9TDI.
On both cars the problem started once the cars got past approx.160th KM.
Take the car to any Bosch diesel dealer and ask them to increase the dwell time on the glow plugs (increase the time that the glow plugs stay on, when the ignition is swtiched on)
Cheers.
SOURCE: need to change glow plugs on a mercedes C220D 1998
dont bother too much with thebullshit recipe .mercedesbenz were built in a cold country and have the cold start tecnique off pat .you need to establish if all the glow plugs are working .,if the engine misses and runs rough when it does start then the glow plugs are not all working but you need to test them with a test light and i would be inclined to think you will need to replace them. do them all as the ones that do work will stop soon.they all seem to go around the same time------------"youdoit "
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