2004 ford focus 2.0liter. clutch pedaL GOES TO FLOOR. brake master full of fluid.I clutch master or clutch slave cylinder bad?

could be either
the problem is air in the hydraulic system either form a leaking slave cylinder or a faulty master cylinder admitting air on application or bypassing oil on application
you have to first check that it is hydraulic operation as the brake master cylinder may have fluid but that is a separate system to the clutch
check that it is not cable operation in which case it will be a broken cable
after the simple check , if it is a hydraulic system , replace both slave and master cylinder as they both wear out together and if it is cable replace the cable

Replace the clutch. throw out bearing, and pressure plate.

brake fluid goes in the reservoir on top of the clutch master cylinder. If there is no reservoir check for a line to the brake master cylinder reservoir as some cars use the brake master cylinder reservoir as a common unit . Check that that reservoir is full. Bleed out the slave cylinder to remove air in the system.

the brake fluid has drain out of clutch master cylinder fill with brake fluid reservoir is next to the brake master cylinder. pump pedal if spongy then bleed system with a 2 ounce syringe at slave cylinder loosen screw and force fluid to the master this will push all the air out.

Check the level in the clutch master cylinder. If the fluid is brake fluid from the clutch cylinder, you will have to replace the clutch master cylinder. When bad, it is common for them to leak into the car and drip fluid on the carpet.
If you have the tools and so inclined, you can change it yourself. Not very hard,. 2 bolts hold it to the firewall, the pin or clip holding the clutch pedal rod to the cylinder (under the dash), then remove the steel line on the cylinder. (The steel line goes down to the transmission, to the little slave cylinder. After new master cylinder is installed, you need to bleed the slave cylinder to get air out of the lines.)

on the transmission there is a slave cylinder that works like a brake cylinder, when you apply pressure to the clutch pedal a rod inside the vehicle under the dash pushes into a clutch master cylinder, (almost like a brake master cylinder without the reservoir, as the clutch master cylinder works off the brake master cylinders reservoir) the plunger in the clutch master cylinder applies fluid pressure to the slave cylinder,(located down on the trans near the clutch fork assembly) which projects a piston rod into the clutch fork dis-engaging the clutch. To bleed the clutch slave cylinder locate the bleeder screw on the slave cylinder,break loose so it loosens and tightens easily. Check fluid in brake master cylinder reservoir,fill if needed, while bleeder on the slave cyl is closed have a helper push clutch pedal to floor and back 7-8 times, (At first the clutch might stay at the floor, just pull it up by hand or foot and continue) after several pumps with no rest time push pedal to the floor and hold down with foot pressure, at this time loosen the bleeder on slave untill fluid leaks out, watch for air bubbles, close bleeder and repeat untill there is no sign of air bubbles, (make sure to check fluid in the brake master cylinder and keep fill as needed, do not let fluid get less than 1/2 empty as it might **** air and you will have to start over) If this does not bring clutch to operate then you need to check if slave cylinder is reachig its full extension of push rod or not. If it is not then you will have to replace the clutch master cyl or the clutch slave cyl or both as seals are bad and wont hold pressure. Or you need to inspect the clutch fork,the throw-out bearing, or the pressure plate fingers and clutch plate for failure or broken bent parts. I hope it turns out to be a easy fix on that clutching thing.

Need to have it check could be clutch master cylinder or slave cylinder or hose from clutch master cylinder to slave cylinder.check brake fluid at clutch master cylinder sit next to brake master cylinder if empty could have a leak. fill and pump peddle and look for leak.

You likely have a leak in either the master for the clutch, the line going to the slave unit or the slave itself. You need to look at these items and replace any leaking components. If the master is full, likely it is internally bypassing and therefore needs replacement. Air in the system can only get in there from a leak. bleeding may make it work for a short time but is not a cure. After making any repairs you do need to bleed it though. (just like brakes)

YOUR CLUTCH IS NOT DISENGAGING. THERE COULD BE A PROBLEM WITH THE CLUTCH MASTER/SLAVE. CHECK FOR ACTION AT THE SLAVE. ALSO, A BROKEN PRESSURE PLATE SPRING OR THROW-OUT BEARING CAN KEEP THE CLUTCH ENGAGED ALL THE TIME.

Its sounds like a bad clutch cylinder or bad slave cylinder or fluid leaking. First check brake fluid level in clutch master , and check for a leak in clutch system. If there are NO leaks, then you either have a bad clutch cylinder or a slave cylinder. Bleed clutch at bleeder screw on slave cylinder and make sure there is pressure from master cylinder. If there is pressure then slave cylinder may be bad replace slave and bleed and that should take care of you problem. If master is bad then replace bleed system ad you should be good. Contact if you need more help. Thanks for using FIX YA.