Iv had these problems for awhile. The first is the car seems to struggle when accelerating as well as going up hills. The rpms dont go up or down but the best way I can describe is that it surges and the only way to stop it is to push down on the gas more. And I dont know if this problem is related or not but it gets horrible gas mileage as well. I dont know the specifics but my 2000 dodge ram 4x4 gets better gas mileage it seems. I drove the same distances with both vehicles and the malibu used a little over 1/4 of the tank where as the dodge used 1/8.
thanks in advance for any help I recieve