Yesterday my clutch pedal went straight to the floor. I pumped a few times and it came back and I got home. I tried again today and it did the same thing a couple of times. The master cylinder is full of fluid and there are no leaks underneath it. Please help - where do I start?? I don't need an expensive clutch rebuild before Christmas.
Merry Christmas and thankyou in anticipation.

Check for leaks in the slave cylinder. Pull the rubber boot back slightly. Also you checked the master by taking the lid off? I got tricked once by looking at the side and seeing the old residue line of fluid. Thought it was full but was low.

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Has anyone (mechanic, DIY) touched it recently? Check the bleed nipple, joint between solid line and hydraulic lines (splits/cracks) etc..

a lot/all of your clutch gear is prob under your intercooler (sorry I'm only familiar with N/A but turbo design should be similar)

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Slow is smooth and smooth is fast.

re-bleed the clutch.

two man job.

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Long live the WRC

I had to re-bleed my old Bug about 5 times, once by Doug & twice by Neil, just a prick of a thing that took ages to sort out.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.

Must be those gibbon feet that caused the clutch to give up!

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No Subarus currently owned

Check slave cylinder to see if fluid comes out from dust boot. And check the master cylinder (under the dash not at the reservoir) to see if its wet/leaking.