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View Full Version : My 1997 Saab 9000 turbo makes a very loud hissing from the front under hard...


David D
11-13-2008, 01:13 AM
...acceleration, what could cause it?
It's a constant loud hiss until I lift off the power, it doesn't fluctuate, just sounds like the hiss the type pump at a petrol station makes, but probably louder! I did notice in some of the paperwork with it ( i just got it last month) that the mechanic noted '(turbo end) minor exhaust gas leak' could that be related? As I said, I can only hear it when I'm accelerating hard. Unfortunately an auto so no boost guage to show pressure drop, but I thought it must be something to do with the turbo. Thanks for the help so far, much appreciated.
It's a constant loud hiss until I lift off the power, it doesn't fluctuate, just sounds like the hiss the tyre pump at a petrol station makes, but probably louder! I did notice in some of the paperwork with it ( i just got it last month) that the mechanic noted '(turbo end) minor exhaust gas leak' could that be related? As I said, I can only hear it when I'm accelerating hard. Unfortunately an auto so no boost guage to show pressure drop, but I thought it must be something to do with the turbo. Thanks for the help so far, much appreciated.