Help identifying a curious noise, may be harmless. [Archive] - Toyota MR2 Message Board

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Hello, I have a 1990 JDM 3SGTE SW20 and it makes a curious noise. When I start my car, it starts and runs just fine, but then after about 15 seconds of the car being on, I hear a funny noise, which sounds like a pressurized bottle being uncapped underwater. Kind of a gurgley, wooshing, fizzy sound. Fairly certain it