I went to see a mechanic and asked him if he could make my wife's Accord not surge so much when the air conditioner is running. He said that he could and when I got the car back, I've noticed that it makes a shuddering feeling when you activate the A/C and each time that the car's A/C is running and it goes to surge, it shudders. I took it back and he informed me that the motor mounts are bad and that is what causes the shuddering. It didn't do it before I took it to him so what could he have done to the car? My wife drives it daily and says that she can get along with her car doing this but I am concerned. Please help. Thank you.