Ok so I have no idea what Im doing when it comes to DSMs. I know a little bit about cars but its not enough for me to get up into the engine bay and start fixin shit.

I have a 95 GST with about 90,xxx miles and I have no idea what is wrong with it other than what I was told by the previous owner. He told me that it had a boost leak and that it smokes some. Well obviously it smokes because I`ve seen that. I dont know why it smokes though. The smoke is white so Im thinking its an oil related thing. Also, it has a really really rough idle. I can turn the car on, and then after about 5 minutes or so, the RPMs will drop down to about 200 or so and bounce around some. I was told it could be either the ECU or the cam angle sensor. About the boost leak, I know about compression testing but I dont know how to do this.

Anyhow, I really wanna get this thing fixed. Is there anyone that can help me? If I cannot get the car fixed I may just sell it. These problems are minor I know, so someone has to know how to help me.