Before you start shot gunning the problem take some time and determine what's causing the problem. Remove the clutch master cap and look inside, is the fluid level ok or low? if level is ok, try to bleed the clutch system and recheck ..still no pedal pressure, check the clutch system. if the levels low then you have a leak and need to find what's leaking. start by looking under the dash where the clutch master cylinder attaches to the clutch pedal. look @ the clutch cylinder / rod area ..is it leaking / wet? yes replace the clutch master. next inspect for any leaks @ the clutch master on the firewall side inc reservoir, clutch hard line / hoses, then pull back the dust boot @ the clutch slave ..any leaks? replace the offender and bleed the system. Good luck!