Outer Limits 4x4 Board

Has anyone had the problem with a td42 or any engine for that matter where the engine labours/stalls when the clutch is pushed in. We originally put it down to the slave cylinder sticking as the throw out bearing was siezed and you could see where it had been wearing on the pressure plate.
So we replaced throw out bearing, pressure plate, friction plate, flywheel, slave cylinder, master cylinder. Also we checked the crank end float and it measured 0.254mm (spec is 0.1-0.4) also you can see that the thrust washers are still intact (although we havent pulled a main cap off yet).
After changing the clutch on first start up the problem still extisted, after pumping the clutch a few times it went away. Then after a short drive it started happening again, not as bad as at first but the engine still labours when you push the clutch in. the throw out bearing is free as you can feel the free play in the fork.
Really puzzled by this now and not really sure what to do next.
Any help would be much appreciated.
Cheers Tomo

if your sitting on perfectly flat ground and put the car in first gear, with your clutch pedal fully depressed, will the car slowly creep forward?

This will help confirm if it is definitely the clutch NOT disengaging that is your problem.

No.. clutch engages and disengages fine.. only the engine will stall unless you rev it. car doesnt move at all.

im not sure i can really help, but its nothing vacume related is it?
only reason i say is my tb45 used to stall sometimes when the brake pedal was pressed consistantly while stationary(i was obviously bored in car waiting for something ;-))

all sorted now.. turns out the new throw out bearing was dodgy