Cold engine and rough idle

[riquuu]

Hey,

couple tiny problems/questions:

1. My Boxster is a bit "abrupt" when the engine is cold. When taking off and changing gear from 1st to 2nd etc. it feels like throttle stays on. After the engine warms up a bit, the problem disappears.

2. When starting the warm motor, idle is normal. After few seconds idling and revs starts to go between 600-800rpm. It does that rough idle couple seconds and calm down. Then the car works norm... perfectly .

I have changed spark plugs and air filter, cleaned coils and cleaned MAF with some special cleaner.

Any ideas/reasons for this kind of problems?

And of course the car has the manual gearbox.

Thx for help