First investment should be in a boost gauge if you do not have it already.
You can tell a lot by the condition of your engine by watching how much boost you put out.
Second check for boost leaks. As these cars get older they will be more prone to leaks. You can make a leak tester like this:
http://www.awe-tuning.com/pages/shar...ssure%20tester
Or you could buy one from AWE. Its easy to buy the parts from Menards and will cost you maybe 10 bucks. You connect it to Y pipe, take oil cap off, and unhook pcv valve and plug that opening, then add pressure up to 15 psi and listen for air leaks. (You will hear girgling down below but that is normal)
Common area's for leaks is TBB, F hose if its the 00 model, rubber hoses on end of Y pipe is where I had a little leak because stock clamps are junk.
Anyway if you search you will read more about how and where to check for leaks.
Third I strongly suggest buying a odbII cable and get vagcom so you can check for codes for your car. This will save you tons of money instead of having to take it in to get things fixed. Plus you can do search on this forum and others to see what any codes mean and you can most the time replace the parts yourself.
Ok thats all for now. Go have fun
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