I asked a question a while back about my 2002 Mercury Sable LS Premium thinking it had a bad transmission but every mechanic I take it they say it's not the transmission. They say it's the mass air flow sensor. My car choke or hesitates when I accelerate it and wont change shift after it gets to speed up. Also an exclamation point in a circle light (!) blinks. Other thing is that all the codes of the car show in the machine. One mechanic change the coil and cables and it's running good but the check engine light came up again. No symptoms yet but every time I started I feel like it's going to do it any time. Will the mass air flow sensor cause all this symptoms to the car?