S13 SR20DET Idling problem and white smoke! Please help!

[airlu]

This just happened today. When I started up my car this morning, there was some white smoke coming from my exhaust and after a while, the idle dropped down to about 500-600 rpm, which feel like the car was about to die. When I drove it, the car is not boosting as strong as it should at 7psi. When I come to a stop, the idle drop down to about 500 rpm and I just have to give it a bit of gas just to avoid it dying on my in the middle of the road. Any suggestion to what to look for or what to check? Anyone else experience similar problem before? Please help.

[RED_DET]

Moving to RWD SR20