I just replaced my timing belt and my car runs rough and the idle surges sometimes. I can drive the car some days and it runs okay then after driving around for say 10 minutes it wants to die on me at every stop sign or if I put it in neutral. It has been getting bad gas mileage as well. I don't know if I got the timing off a bit or if there is a new problem. I cleaned maf and checked all spark plugs and the coil pack. Any help would be appreciated.