2001 Chevy Malibu has been surging for the past 2 years. The transmission has been checked, I had just replaced the catalitic converter around the same time the car started surging. I took off the MAF and the car stopped surging but it rode rough. I replaced the MAF and the car still surges. It starts to surge after a right turn, after it goes over a speed bump, after it goes over a dip. It surges going up hill, it starts to surge when the car comes to a sudden stop or after I slam on the brakes. And now it even starts to surge when I'm just driving straight down the road and I excelerate. I put the OBD2 machine on it but it does not have any codes(DTC'S) on it. Please help, I don't know what to do.