WRX question. please look!

[Got Milk?]

Okey, i just bought a 02 WRX from one of the member on here yesterday. I just went for a drive, i was doing around 70mph in 5th gear. So i step on the gas and i reach to about 90mph and than the car just kicks back as if i was breaking hard with me still on the gas peddled to the floor, i get scared and let go of the gas. As that happened check engine came on. I slow down and go WTF, did i just buy a ****ed up car. SO i try doing the same thing but in 4th gear, i do 70-110mph in 4th gear and everything is fine. Now i try fifth gear again and it does the same thing again at 90mph, but this time i kept my foot on the gas. The car kicked back as if it was breaking at 90mph but with my foot still on gas, the car kept going and than kicked back at about 100mph again, with my foot still down on gas, car kept going and kicked back again at about 110mph. Than i just give up come home and sat here and worried my ass off. Well ill be going to a shop tomorow to see what codes that check engine will throw out.


Can someone please tell me what might be happening here.


UPDATE:

I went to auto zone, they gave me this info

The PCM has determined that the voltage for wastegate solenoid "A" is out of range for the current engine operationg conditions.

WTF does that mean? help anyone. And today i filled up my tank, and the check engine went away.