Engine noise ?

Jxcruz

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Joined
Mar 20, 2023
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Bay Area, San Jose
Hello all,

The noise has started about a week ago. Not sure if it’s engine or transmission related. But every time I put the car in DRIVE it makes this noise. Sounds like a helicopter is inside my car. I’ve tried tracking the noise and I can’t seem to figure where it’s coming from. But the noise happened after more than a week of me flashing the TCU. I flashed the TCU from sxthnk . It was the BMS TCU. Not sure if that could be the culprit? But when the car is in other gears, it won’t make the noise. Also the car makes that noise when I’m only braking. But when I’m accelerating, it doesn’t make the noise at all. I’m thinking of going under the car, maybe something is loose or maybe I should flash the TCU back to stock and see if it goes away. I just wanted to see if anyone has experienced this before
 
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