08 E350 with a loud whistle
#1
07-02-2012 | 02:45 PM
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Junior Member
Joined: Jul 2012
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08 E350 with a loud whistle
I have an 08 E-350 12 passenger (77k, 5.7l).
It has developed a loud whistle that comes from the driver's side behind the door. It has baffled my troubleshooting because it happens at all speeds even after a stop. It also happens with the AC on or off.
It has developed a loud whistle that comes from the driver's side behind the door. It has baffled my troubleshooting because it happens at all speeds even after a stop. It also happens with the AC on or off.
#2
07-02-2012 | 02:51 PM
Senior Member
Joined: Jun 2010
Posts: 15,301
If it happens after a stop, with the engine still running, then we would suspect a vacuum leak. Something as simple as a piece of hose held next to the ear and the other end moved around to where the whistle seems loudest will help pinpoint the exact area.
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