Clutch going soft (Evo 8), any ideas?

Question

05 Mitsu Lance evo 8

Aftermarket stage 2 clutch - no problem.

Replaced clutch slave cylinder and the metal hose running from it (there was a lot of wear on those ones, and the threads on the regular hose were woren, but not stripped). Put everything together, and tightened the hose (to metal ones) just enough for it to stop leaking when bleeding.
Bled the system. Everything worked normal. Filled up the reservoir to the top.

After about 30 minute drive in 5th gear (freeway), the clutch went soft again, i had to pum the **** out of it to get it back up to pressure. 

I know theres no air in system because i bled it properly, and took my time. 
It doesnt seem to be leaking ether because when i puleld over to pump it up again, there was nothing on the ground.

Any suggestions?
3 hours ago - 4 days left to answer.

Additional Details
edit1: checked master, nothing, dry as its supposed to be.

! · Accepted Answer

Obviously the air found its way into the circuit.
Re-check:
the fluid reservoir running dry during bleeding;
the hose connection not oil/airtight;
the instaled slave cyl. new or refurbished? Seals occasionaly do have a way of slowly letting some air in.
topping up with proper grade (DOT) fluid? some fluids are incompatible, mixing may deteriorate seals.
That's about it. Re-bleed carefully using the proper procedure (hose extremity below fluid level in jar at all times).

? · Answer

We had one spoiled teenager that fried his snatch in a carpark a week after choosing up his new EVO which his mum and dad bought for him! His individuals got here in to ask why we weren't honoring the guaranty and changing the snatch for loose. I asked his individuals if " We drank a case of beer and did 4 wheel burnouts interior the parking zone until the motor vehicle does not circulate and now my Dad gets me the contest snatch i choose" rings a bell. the respond grow to be " Oh that explains it then". There are extra spoiled brats using EVOs than the different experience i've got worked on. do not in basic terms complication relating to the snatch which will desire to final seventy 5,000 miles until somebody thinks a 4 cylinder motor vehicle might desire to climb a tree, i might additionally look into the physique for indicators of the place they hit the tree while they found out they did not quite understand how tochronic!

Clutch going soft (Evo 8), any ideas?

2 Answers