Low buzzing sounds like alarm clock

[Blackwater]

I have a dull buzzing coming from the top hose off the intake that wraps around a connects to the the rear of the motor. This hose has a canister in the middle of the run. Sorry if I had my book on me Id be able to list what this is and what it is running to.

It buzzes under idle only. took a few days to track this down.

 

[grantikal]

i am experiencing a similar problem and i have not found the culprit but i did get a few leads. Autozone clerk an ex ford mechanic took a listen and thought it could be the idle pulleys i have the 5.4 so it has one on each side or a vacuum hose. as for now i am still not sure maybe I will get to the bottom of it when i replace the drive belt sometime this week.

 

[thePUNISHER]

I have a dull buzzing coming from the top hose off the intake that wraps around a connects to the the rear of the motor. This hose has a canister in the middle of the run. Sorry if I had my book on me Id be able to list what this is and what it is running to.

It buzzes under idle only. took a few days to track this down.

the Pcv hose? to the passenger valve cover? its probably the pcv valve. ford revised it for this issue. replace it.....

 

[grantikal]

did some research at autozone:
some possibilities:

Symptom: Hum/Buzz/Whine
When: Idling or Driving
Where: Engine Compartment

Priority Action Part Type Cause
1 Inspect Belt Incorrectly Routed, Adjusted(Tensioned), Missing or Worn Drive Belt(s).
2 Inspect Fan Clutch Loose, Faulty or Worn Out Fan Clutch.
3 Inspect A/C Compressor&Clutch Damaged or Faulty A/C Compressor and/or Clutch, Low Oil Level.
4 Inspect A/C Compressor Damaged or Faulty A/C Temperature Switch Cycling Compressor On and Off Too RAPIDLY, Low Oil Level.
5 Inspect A/C Temperature Switch Damaged or Faulty A/C Temperature Switch Cycling Compressor On and Off Too RAPIDLY, Low Oil Level.
6 Inspect A/C Hose Assembly Metal A/C Lines VIBRATING AGAINST Other Components Under The Hood, Faulty Blower Motor BushingS.