01 F150 w/5.4. Loud buzzing from top left of engine. It appears to be coming from either a coil or a fuel injector. It is for sure coming from that area so it must be one of them. Runs fine but the thing is buzzing really loud! Any ideas? Thanks

 

Replace PCV valve

 

Didn't think of that. What makes you think that is the source?

 

Sometimes when they go bad or get crap stuck in em the check doesn't seat and vibrates like a kazoo! Haha

 

Pvc is the problem did it on my buddy's f150 this summer

 

PCV valve. I've seen a bunch!

 

Well that's good to know. I have a new one just haven't had time to put it in yet. Will have to do that this weekend. Annoying to say the least.

 

Yeah that was it. Thanks!

 

Woo hoo! Glad it was easy, yer welcome and thanks for the update!

 

Has anyone replaced their valve with a breather/filter, and pluged the hose? If so. did you notice it running any better, or better fuel milage? I have to change mine due to the buzzing also, and figured that keeping the oil mist out of the intake and a/f would help. Thanks.