[swimmingly]

My car always seems to have a difficult time idling at a above 900 rpm. When the car is cold, the idle hangs around 950, which feels right (but, I think it's suppose to idle higher when cold?).

However, after driving the car around and getting it nice and warm, when I idle, the rpm drops down to around 600 and I can keep hearing the engine sound like it's struggling as the rpm fluctuates up and down between a 500-700 rpm range, which it eventually levels out to around 700 rpm.

Anyways, I'm thinking I should fix it soon because I'm tired of the struggling sound and vibrations when the car is warm and idling.

Does anyone have any suggestions as to where I should be looking? I have plans to replace the following during spring break:
1. ISV - add in the venturi delete while I'm in there
2. TPS
3. seals on the TB - Arnnworx's kit

Anything else I should look at?
Thanks