i have a 02 wrx wagon, and i have a pretty bad idle surge i couldnt find much in to forums on how to do it. if you have any suggestions that would be awesome
You need a tool called a "boost leak tester". You will pump air into your intake track and listen for leaks or spray soapy water to get a visual of the leak.
A quick Google search will yield many sites to buy one premade and instructions to make one yourself if that's your fancy.
But until then, get a screwdriver and tighten every hose clamp from the air-box to the throttle body. Dont torque the crap out of it, just a sure hand tight.