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Backfire

Engine

Vehicle Information: Model: 911 Carrera Targa Slant Nose; Year: 1986; Body Type: Targa; Engine (type, size, modifications): 3.2; Total Mileage: 77000;

I've noticed lately that when the car decelerates at about 35 MPH in 2nd gear, or at about 20 MPH in 1st gear, there appears to be a backfire. It is not loud, but is noticeable with the radio off. It does not happen all the time.

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