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Mystery sound behind dash at startup.

Golftropy

New member
Location
Oakland,Ca
Car(s)
2015 GTI
Hi y’all,
2015 GTI , 63k: on startup has this funny squealing/groaning noise for a few seconds, thegoes away. Doesn’t occur at every startup.
Here’s a video of the sound:


Thanks!
 
Last edited:

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
Just sounds like maybe the fuel pump priming. Try it with your hood open and you or someone else listen from there.
 

The Fed

Old Guys Rule
Location
Florida
I'll bet a blend or other door. Try to listen for where behind the dash it is. Do you have the A/C turned on? If so, shut it off and see if it does it.
 
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kevinkar

Go Kart Newbie
Location
United States
That definitely sounds like an environmental diverter and not the fuel pump. That primes when I open the door of my R and you should hear it when you open the door too.
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
That definitely sounds like an environmental diverter and not the fuel pump. That primes when I open the door of my R and you should hear it when you open the door too.
What's an environmental diverter?
 

Golftropy

New member
Location
Oakland,Ca
Car(s)
2015 GTI
I'm guessing by "environmental diverter" and "blend," what is meant here is part of the ventilation system (a flap) that diverts air to the vents that opens at every start-up. It does make the sound with AC off. I should try it with every variation of fan speed & temperature...
The sound comes from behind the vents (as in video), so that makes more sense than the fuel pump.
 
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