i have a question everyone. i have just recently bought 2003 wrx and i am trying to use my old cool air intake from my old jetta 1.8t all i want to use is one tube that is about a foot long so i disconnected the airbox form the wrx and took the mass air flow switch from it also. then drilled a hole into the old intake tube the same size as the mass air flow so it will fit then reconnected everything and screwed it down then i went to start the car and the car will not start. but it will start if i put everything back to normal. my question is does that mass air flow have to be air tight or grounded in any way so that the car will start?

thanks......