Clutch pedal ('88 300zx) won't come off floor but clutch itself work just fine and shifts as normal
Clutch engages and disengages as normal and pedal action 'feels' normal while the pedal is in the 'engage-disengage' zone.
However, there is no resistance whatsoever between the 'free play' zone and where it first disengages---and the pedal will only pop back up into said ' free play' zone if I pull it with my toe.
The return assist spring is intact, installed properly (near as I can tell) and seems strong. The bracket hadn't been touched/altered (AFAIK) before this started but I have re-greased all moving parts in the pedal assembly and through the firewall just in case---with no change.
Is this a slave or master cylinder issue?
I concluded it wasn't since the clutch otherwise works just fine and all fluid levels are staying topped up.
Or am I dead wrong?
What else should I look for?
One last clue (just noticed today):
The pedal does snap back to top all by itself now and then if the heater is on long enough (we're in a cold climate up here in Canada) but I still cannot generate any resistance between the 'free play' zone and 'point of disengagement' no matter how many times I pump the pedal.
Turns out there was a small leak/crack in the slave cylinder....which resulted in a small bubble of air which, in turn, affected the flow return valve(?). I replaced the slave cylinder, bled the lines and all is back to normal.
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