I think I had my first boost creep expereince. I have a 03 WRX with a APEXi catback exhaust. I was running at high RPMs in 3rd, changing gears when the car kinda lurched and jerked. It scared me, I thought I blew my engine or crushed my tranny. I read that with the 2.0 boostcreep wasn't a big issue, but that's what happened. I read the code that came up, it was the "Turbo/Sup wastegate solonoid A range performance" so I'm guessing it was the boostcreep. Anything else that can cause this? I have a boostguage installed, sometimes it spikes pretty high (it says 18) when I accelerate, is this normal?