Hello, I have a 2001 grand prix V6 and when you are driving along the speedometer will start goin nuts(up & down) and you give it the gas and it doesnt go until it kicks back in gear hard, and it hesitates while doing this, would this be the maf or speed sensors? I am taking it to the mechanic tomm, the mechanic cleaned the sensors about 3 weeks ago and it didnt do it for one day then the next day it started doing the same thing????? There is no service engine soon light coming on so no codes are being thrown out?
