Replaced master cylinder and slave cylinder and there is no resistance in clutch when i tried to bleed it according to the manual, (the clutch has already been replaced)

Try bleed

1. Check the fluid level in the master cylinder. ...
2. Locate the bleed screw on the slave cylinder. ...
3. Attach the hose to the bleed screw. ...
4. Open the bleed screw on the slave cylinder. ...
5. Have a friend press the clutch pedal in and hold it. ...
6. Close the bleed screw. ...
7. Have your friend release the clutch pedal.

Bleeding Clutch by Blocking the Slave Cylinder

Bleed according to instructions, bleed clutch slave cylinder. The slave cylinder should have replaced at the sametime.

Jamie, are you losing any fluid from the clutch master cylinder? By small resistance I presume you mean the pedal feels soft?

If you're losing fluid from the master cylinder you have an obvious leak somewhere and air is getting into the system.

Most leaks occur from the clutch SLAVE cylinder as it does all the work .. If there's no leak from the clutch slave cylinder, suspect the seals inside. It's like a bicycle pump ..the seal inside wears and it won't pump..

You may be able to get an overhaul kit. I'm in the UK .. but here's an Ebay link for a slave cylinder overhaul kit just to show you what it looks like:
FORD CORTINA MK2 CLUTCH SLAVE CYLINDER REPAIR KIT SP2085
Here's a link to show you what the slave cylinder itself may look like (it may NOT be for your vehicle..)
CLUTCH SLAVE CYLINDER FORD FIESTA ESCORT
It's easier and quicker to fit a new slave cylinder than it is to strip down and replace seals with a kit. Be aware, after overhauling or replacing a slave cylinder you have to bleed it - remove the air.

The easiest way of doing this is to make sure the reservoir is fill of fluid, crawl underneath the car with a spanner/wrench, place a rag over the bleed point and get somebody to pump the pedal a couple of times while you undo then tighten the bleed nut.

If it's not the slave cylinder at fault- then it's the master cylinder. Master cylinders also have a 'piston' and rubber seals which wear/perish.
However, it's more than likely that it's the slave cylinder at fault

Did you bench bleed the master cylinder? If you didn't, crack the line to the slave open at the master, work the clutch pedal until fluid comes out the line you cracked open. Now close and tighten the line, and it should bleed normally down at the slave cylinder.

no fluid in the clutch reservoir due to a failed clutch slave cylinder
time to replace both the clutch slave and master cylinder

Check on the upper part of the pedel to see if the clip that connects the pedel to the clutch master cylinder has poped off If the clutch pedel is on the floor this is a likely sulition and relitively easy repair you just reattach the clip

Almost every time a clutch is replaced in a GM with hydraulic release system that system is replaced as well. You can try, and try, and try again to bleed it, but you will eventually replace the clutch slave and master cylinders. Once the slave is allowed to fully extend, it is then virtually impossible to make it function correctly again.

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.

You could refill but, i would replace the clutch master cylinder and slave cylinder as well. these two parts are failing.

i think youre doing the right thing. they are very stubborn to bleed because the hyd. line goes up high across back of engine before droppiing back down to slave cyl., trapping air. could try to gravity bleed by opening bleeder at slave, cap off of master cyl, full with fluid then it may start to come out after a bit. then try your process again. or can try to bleed at connections further up the line, working your way back to bleeder. hope this helps. be patient.