is this engine sound normal? hissing noise

4.6_02_Black_GT said:
I vote for AC....mine hisses and this is normal its the ac system high pressure side bleeding down.(or at least that was the dealer tech said :shrug:

A dealer tech said that???


It's the water from the A/C leaking out of the evap box and falling down onto the exhaust. On the Mustang, the drain hole for condensation just happens to be located over the exhaust. It drips out all the time but you only hear it when the car is off.