1G Clutch and Slave Cylinder diagnosis

[ATXDSM]

Trying to figure out my clutch problem. Clutch pedal is adjusted up properly and the master cylinder adjustment is near maxed out. When I push the slave cylinder in by hand, the slave depresses all the way in and when I let go, it does not extend back out. It barely extends back out leaving the clutch fork loose. To get the pressure back up I have to press the clutch pedal down in which it sticks to the floor. I have to pick the pedal back up by hand then press down again and the pressure is back. The clutch fork sits right in the middle and there is no leaks from the master cylinder and slave cylinder. It has a new XACT Streetlite Flywheel and ACT 2100 with solid street disc installed with OEM TB that has only seen idle time and a brief drive around the block. The system has been bled as well. Ive searched many threads and cannot find a definitive answer

 

[DSMPT]

Sounds like worn out piston in master or slave cylinder. Replace cylinders with new or rebuild if still within spec. I recommend you to replace the both of them with new at the same time.

 

[ATXDSM]

I was thinking the same thing but wanted another opinion before I threw some parts at it.

 

[DSMPT]

I had exactly the same issue when I upgraded the clutch from old stock one. I rebuilt the cylinders but didn't last long. After I replaced the both of them with new OEM, the issue was solved.

 

[ThunderChild]

Agree with @DSMPT, sounds like an internal master leak, or air in the line more likely. May even be leaking into the booster itself.

 

[pauleyman]

Agree with @DSMPT, sounds like an internal master leak, or air in the line more likely. May even be leaking into the booster itself.

Booster???

 

[ThunderChild]

From the master cylinder into behind the booster diaphragm, hence why he wouldn't see leaks, but still having issues. Have seen a couple threads in the past year where this was discovered as the issue after investigations. Just a thought

 

[AWD-Tony]

Take the hose off the booster and stick a long zip tie down the hole. You will see fluid on the tip of the zip tie if it's leaking internally.

 

[pauleyman]

From the master cylinder into behind the booster diaphragm, hence why he wouldn't see leaks, but still having issues. Have seen a couple threads in the past year where this was discovered as the issue after investigations. Just a thought

We're talking about a clutch. So again....booster?

 

[AWD-Tony]

We're talking about a clutch. So again....booster?

Haha. Sorry. I had brake master in my head for some reason. Prob because I replaced clutch master, slave and brake master recently.

Op. Have you had the clutch line open recently? If so, most likely you have air in the system. If not, replace both master and slave. They’re fairly cheap from rock auto.

 

[ThunderChild]

We're talking about a clutch. So again....booster?

And so did I... brain fart. Thanks for the catch @pauleyman