If anyone else has a 2011 v6 auto that can test to see if it happens on theirs to that would help. It only happens when you turn the engine off. See video
This sounds like the EVAP purge valve releasing vacuum when the engine shuts down.
Its job is to draw in fumes from the gas tank to be combusted in the engine to reduce ozone damaging emissions. The valve opens when the engine shuts down because there is no longer a vacuum source to keep the valve closed.
I sure hope you are right! I have determined it is being released back down the intake tube. If you take it apart you can feel the air being pushed out of the intake tube. I took it apart at the clamp right after the MAF and there is for sure air being forced back down the intake.
That would be me . I'm on 9 Mustang Forums . Just checked on the sound and 'mine does it too'. Never have noticed it before because it happen so soon after the motor is turned off. I have to say "its normal" .
at first, you said it does NOT now you say it DOES.. lol which one is it? You can not hear it if you turn the car off while you are in the car with the doors closed and windows up. You have to be outside of the car to hear it even better with the hood open. If you could know for sure it would help possibly save me a diagnostic fee lol thanks for all the input tho!:grin:
I started my Mustang at daybreak with the hood up "just for you", to listen for the sound. My "neighbors" were not happy . I "always" have my Shaker 500 at no less than 50% volume. The sound happens the second the key is turned off. The radio doesn't turn off until the door is opened. This is why I haven't noticed the sound
I haven't noticed that sound from mine, but much like David Young, my stereo is always on (and loud) until I open the door. That being said, my previous car DID make that sound (2011 Mazda 6). It wasn't immediate: after about 3 to 5 seconds, a very subtle "woosh" sound could be heard from beneath the hood. The guys on the Mazda forum said it was normal.
thanks for all the help guys especially to david young here! I can sleep better at night now. :grin:
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Mustang Forum
3.7M posts
229.4K members
Since 2001
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!