L200s Auto, Mind To Answer... TQ!

[Avanzato X4]

i driving l200s turbo A/T, got some funny question i have to ask:

1. why sometimes my rpm rev up and down once my airconf switch off? 2k-3k-2k-3k up & down...

2. my blow-off valve always blow off engine oil, izzit normal or... what can i do? any parts got problem? turbine?

3. once i switch on my headlight, my RPM drop much, izzit due to bad grounding?

4. any good and specialist mechanic that can fix L200s turbo engine well in kl area to recommend?

Thanks you very much!

 

[Avanzato X4]

update...