Contour Enthusiasts Group Archives Forums General Troubleshooting weird sound

I installed a k&n conical filter to my intake and now there is this sound coming from the end of the intake. how i instaled it was i just took the top of the intake box off and disconected it from the maf and left the bottom piece of the intake box as it is. i connected the filter to the maf and let the filter rest in the bottom piece of the intake box. I left the bottom piece in hope that it would help to maybe shield some heat. The noise sounds like when you blow across the top of a beer bottle and it makes that humming whistling noise, you know what i mean? and it still makes it when i take the filter off and even when i try to move the incoming airflow around with my hand. any ideas of what it might be?

Are you sure you did not have the "moosing" problem before you made this mod? This mod may make the sound worse, since it has less resistance to air flow, it may also damp the noise less, making it more obvious. This can be caused by the galley in the intake manifold behind the throttle body being clogged.

I had the same problem, took it to Ford and they replaced the intake air bypass valve. I guess it takes a crap when intakes are changed. Oh well I hope it helps.

try the TH fix listed in how to on the main page. Or you could pay the $$ to have Ford replace the IAC and possibly have the problem again in 6 months to a year.