I have a 2002 WRX and it USED to have a stage 2 tune on it. The guy I bought it from said he re-flashed the map back to stock. It also had TGV deletes. It still has the deletes, but is stock. It has a wondering idle when I start it, and when it warms up it levels out. But when I'm driving it it sometimes doesnt want to boost right, like hesitates and when I stop and its in neutral it almost bogs down enough to stall. I AM getting a P0171 I think it was..if it wasnt that, then it was close to it. Its not with me or I would scan it again. Basically it was running lean is what it scanned. The guy I bought it from said he thought the problem was a vacuum leak. I have never dealt with tunes before, so its all new to me. But if anyone knows what I could do, that would help me out. I checked the plugs that you connect when you tune and he has them disconnected like it says too, so I dont know. I am going to check the fuel pump, and filter next unless someone thinks they know something otherwise. The guy I got it from also said he did the tune/de-tune open source, so ecu flash, romraider, and a tactrix cable. Do I need these things to fiure out what is wrong with it? Can anybody help?