Ive picked up an AFM for my 7m-gte swap. I tested the TPS and AFM and seems the TPS was bad so i changed that out. Seems to run better, but when the motor is cold it bogs for about 10 sec then idles normally. When i press the gas the car sputters on the cold starts, but after it warms up it revs fine and runs perfect. After i tested the AFM with the ohm meter it seems its way out of spec...is there a way I could fix the afm myself? How much is a new one from a dealer?