Hissing when clutch depressed

[HyperGSX]

when i press the clutch in, it makes an air hissing noise kind of like a vacuum leak. However, my car runs perfect and i hit the boost im supposed to be getting. Btw, the noise seems to be coming from under the steering wheel area

 

[andymoraitis]

Clutch slave cylinder is likely leaking. While you're at it, you may want to replace the master cylinder as well so that you don't fix one thing and have another crop up.

Hope that helps,

Andy

 

[HyperGSX]

Clutch slave cylinder is likely leaking. While you're at it, you may want to replace the master cylinder as well so that you don't fix one thing and have another crop up.

Hope that helps,

Andy

ahh not that again i replaced both like 30k ago

 

[badbeaumont]

Sorry to bring back a dead thread but did it turn out to be the slave cylinder? I have the same hissing from where the pedals are when i fully press the clutch.

 

[Defiant]

If you're running an aftermarket boost gauge, look for something in the clutch pedal mechanics to be interfering with or cutting the sensor line.