High-pitched noise
I've noticed a high-pitched whistle/~squeaking that only seems to occur while the car is level and in drive. It's noticeable at idle and low speeds and seems to go away (after a second or so) when put into neutral. It's not very loud (yet), but I'd rather head off an issue than try ignore it.
It's still there with the A/C and head unit off - was originally thinking speaker hiss or fan whistle. Also, there doesn't seem to be any noticeable difference with windows up or down.
I'm thinking PCV, diverter valve, intake or vacuum hose leaks etc... but it's weird how it goes away in neutral or if on an incline (it seems) - though perhaps that could just affect engine load.
The car has been tuned (ECU & TCU), but I've only just noticed the noise in the past few days.
Any ideas/advice?
Last edited by nermal; 10-03-2023 at 08:06 AM.
2018 Arteon R-Line - Black, Sunroof, Dynaudio, 20" Wheels, RacingLine: Stage 2 ECU+DSG|380mm BBK|Intercooler+Hoses|Oil Cooler|R600 Intake|Adjustable Front Droplinks|Dogbone Insert|Subframe Brace+Alignment Kit|Propshaft Alignment Kit, Milltek: Zirotec Downpipe, Harding: Front+Rear Sway Bars|Rear Droplinks, Other: OSRAM Dynamic Indicators, EvcX Throttle Controller, 034 (RED) Coil Packs, Various Carbon Bits
2022 Tiguan Allspace R-Line, Grey - Sunroof, Harmon Kardon
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