Question for you all. My Beetle is hard to start once the temperature get down below say 50F. By hard, I have to keep the starter engaged quite a bit long, probably like 10 seconds. I have a history of diesel ownership and this is the first one where I don't notice the glow light on the dash staying on longer when the temperature drops (which I find odd).
Anyway, my initial thoughts turn to the glow plugs not getting hot enough. My other thoughts are maybe the starter isn't turning the engine fast enough to build up compression.
I've tried cycle the start switch three or four times, in an attempt to heat the glow plugs up more, and then engage the starter, but that doesn't seem to make much difference. I don't know if the glow plug dash light is a true indicator of glow heat. The glow light in the Meredes I used to own would stay on for 15 seconds or better when it was cold.
I don't want to burn up the starter and don't know what the duty cycle of that would be.
The engine has, and always has been serviced with synthetic oil. I thought that stuff wasn't supposed to thicken up like regular oil when it's cold.
I guess as a testiment to the battery, it is the original battery. The battery has given me no problems, but does drag a little when it's cold. It might be time for a new battery.
My guess are either glow plugs, battery or this new low-sulphur diesel fuel.
Finally, I have NO troubles with any of this when the termperature is above 50 F or so.
Anyway, any suggestions would be appreciated.
Greg