I just wondered if anyone else has had this problem? When I go to step on the gas pedal it is stuck, I have to step hard on it to make it "release". It does not stick when it is pressed to the floor, but when it is in the up position? I had this problem once before at about 30k miles. The Nissan dealer said the throttle body needed cleaning, this did fix the problem at the time. But they did charge me $40 bucks to do it! Now I am at 95,000 miles and need to have it done again. Is this something that I can do myself? If so, what do I need to do? Thanks for any help.