Rev needle rising on start up ??

Papasmurf100

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Hi guys,

My partner has a 2.0tdi sline black edition A1. For a while now the Rev needle rises on start up to 1000rpm. I was just wondering is this normal ?
Also when you try to start the car sometimes there is a delay on the car starting up, as in when you turn the key it’s as if when you turn the key when thebattery is dead there is nothing, but starts a couple of seconds later. Any ideas ??
And finally when the car is siting idle there is arandom buzzing noise, it sounds random I know, but every few seconds or so you hear thisbuzz/vibration.

Thanks if anyone can help
 
Think the delay between turning key and starting is the glowplugs warming up.
 
Correct, vehicles with stop/start fitted will fire when it’s ready hence the small delay, this is more apparent when the ambient temperature is colder.

The revs raising when starting again, is normal.