This is the deal I dont know what to do. My 03' rexxy is giving me a fit with the clutch pedal. First of all I have had a new clutch, pressure plate and throwout bearing installed a couple months ago, had the ecu tuned, new suspention, tires, wheels, breathing tubes from front to back, you know the works. Everything worked fine and then all of a sudden the damn spring for the clutch fork broke. While it was broke, as you all know you lose pressure in your clutch pedal (kinda feels like your brakes needing to be bled) you also receive a check engine light. I got that problem fixxed; check engine light went off and everything was right as rain. Well a couple weeks ago i started noticing that I was losing pressure in my clutch again. I immediatly checked the spring and it was still there, so I took my rexxy to the dealer. They pressure tested the clutch lines, slave cylinder and master cylinder and concluded that there weren't any leaks and everything was working properly. The only thing they could think of was that it was pointing to the flywheel (since the one on the car was still factory) (i know what your asking and it was a money thing) so I replaced the flywheel this past weekend with an upgraded and lighter one, but the problem I'm having is still present. This is exactly what it's doing. I start off and have full pressure to my clutch pedal. If I drive like granny I will have full pressure through every gear, but if I get down on it after starting off. The faster I go the less pressure I have in my pedal when i go to change gears. Example, I hit 120mph and changed into 5th gear after doing so the clutch pedal was on the floor and I had to kick it to get it to come back up. Now this is the weird part if I let it sit in a certain gear for a while after changing gears it will build pressure back up on its on or it'll build pressure "sometimes" if I pump the clutch like you do when you bleed your brakes. I'm just confused on what to do, someone please give me the correct answer.