OK so I have a single cam and i will be driving around for a little, then when im at a red light and go to give it gas the idol just drops down and bogs sometimes it is a little, other times it goes to 200 rpm's it all varries on what the motor wants. and also if im just crusing in 5th or that ever gear I will feel the car kinda slow its self down almost like it is struggling. Im thinkin maf but im not sure because when im at lights the rpm's dont move but sometimes they will, what do you all thing it is? Thanks.