Hi, as you can see that I'm new to this forum, but I have posted on other forums before. Anyway I am a proud owner of a white 07 Yaris hatch. I love the car for what it is, affordable, roomy, and fuel economical (been measuring the fuel economy, so far so good...). Anyway, I just noticed something when I was driving with the radio off. I hear like a very light tapping sound coming from the engine. I was trying to isolate what that sound may be and I noticed that the sound only comes when I accelerate or tap or floor the gas pedal. Call me crazy, but I have a theory that it might be the VVTi kicking in. If you know what it is please let me know...I don't want to live with the fact that something is already wrong with the car I just bought...Lastly, nice to meet you all!