I have a buzzing noise on the drivers side of the engine that has been driving me crazy. It only can be heard at idle. I thought it was the PCV valve hose at first, but changing that didn't do anything. I have noticed if I pull the oil dipstick out, the noise completely goes away. I'm at a loss here. Has anyone heard of anything like this?

 

You are probably right, but it's not the hose. I would replace the PCV valve, they have been known to do that sometimes.

 

I ordered one online. But it looks nothing like what is on the truck. I'm unable to find a part #.

 

Alot of the guys on here use Tasca Ford, might try them. Just don't go after market, get the Ford one.

 

Rock Auto sells the Motorcraft PCV. $17.50 or so..

 

i found the part number, it's a little more expensive than a typical pcv valve. apparently the 5.4 3V on the 2009 is different. I did however record a video of the noise in question. If anyone has any idea or has seen something similar will you please respond. thank you to everyone who has so far.

http://youtu.be/Jib8Ej8zdcg