Seems like everytime I try to advance my timing (12-16*), my car starts surging like crazy. Right now my timing is set at 10* and the car feels alright, but I want a bit more of a kick to it. I do take the spout out when I check the timing and do everything right. Once I put the spout back in, and put the car in Drive(AOD), car starts surging and dies on me. Any suggestions as to what is happening?