Just buy a can of throttle/carby cleaner and give it a try.. It will cost you $10, and 15min to do the cleaning. I understand people questioning this if this cost $100 or something like that, but its dosent. Go buy a can of cleaner and try it out for yourself, the worst you will see is no improvement. Even if that is the case you can be happy knowing that your throttle body, and intake are nice and clean.
