500rpm Idle when in Drive.

[Z2TT]

I've allready tried that, but even at higher idle it still is rough and the car shakes a bit.

[MrStroker]

Did it solve your 500rpm idle problem when in drive?

you could also have any of a whole lot of other problems, what have you checked?
any other symptoms? (the 500rpm idle ma not be related)

[Z2TT]

Car doesn't show any other problems than that. Only other things is that I hear a rattling noise coming from the firewall when accelerating, increases with accelerating, and on cold starts the engine will shake like it's running on 3 cylinders for about 2 seconds or so, then revs go to normal idle speed.

I've checked.

Compression
Spark Plugs
Air Filter
Timing
Cleaned the ISCV Valve.