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Discussion Starter · #1 ·
Hi all,
I have a 2016 118d which i have removed and cleaned the EGR valve.
I used ISTA to retract the valve by 30% before installing it as well.
the issue i have is once i plugged the valve in it makes this high pitched whistling/ringing noise.
the sound comes on when the ignition is on.
there isnt an engine check light.
anyone has any idea what might be the problem?
 

· Super Moderator
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634 Posts
Whistling would suggest there is a leak of air somewhere - i.e., you've burst the flex pipe during the removal/reinstallation process.

Could also be normal flow of air through the valve but it's hard to say without hearing the sound.
 
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