try it out, more likely then not its this, but as i stated in the writeup it could also be your TPS or even a vacuum leak. There is a really easy way to check for vacuum leaks to. so while i'm at it here it goes. i don't know how effective this is but you can just take off your intake and cover the throttle body with something (your hand will probably work), while the car is running, so that the motor gets no air, if it turns off, no leak, if it turns doesn't off you have a leak. i think that way would only be effective for really major leaks though, but i hope it helps you guys out there.