I first thought that it may be the Air Mass sensor because I was getting a P0110 reading which is the "Air Mass circuit malfunction". I replaced the AM Sensor hoping that it would fix the problem but it didn't but the fault code went away. Now I'm thinking that it may be the crankshaft position sensor but have no idea how to find it and if it has to be programmed by the dealer as some others suggested. I'll appreciate any input from anyone with first hand knowledge. Thanks.