There could be several reasons why your Presta valve is not inflating properly. Some common issues include a damaged or clogged valve core, improper valve alignment, or a loose valve nut. It is also possible that there is a leak in the tube or the valve stem itself. Check these potential issues and make sure everything is in good condition before attempting to inflate again.
pcv valve wont work properly
Idle Air Control Valve....if this breaks you car wont idle properly....the rpm will go up then down all the time when idling
have the valves been lapped in properly,do a compression check,make sure valve timing is correctly set.
It needs a new washer in it.
If you have a bent valve slide, or valve, or valve casing, they usually wont move. Valve's and valve casings would prevent the valves from moving, while bent valve slides wont easily pull out. If you suspect a bent valve, valve casing, or slide, try cleaning and oiling it first, valves and slides can become stuck with the lack of valve oil or slide grease.
Is it plugged in properly
Chances are good that when you oiled your valves, you didn't align the pistons properly. When you reinsert the piston into the valve, twist it clockwise (by twisting the button) until it "clicks" into place. That should align the valve properly, and you should be able to play your trumpet again. Another possibility is that you put the pistons in the wrong valves. The pistons and valves are each marked with a number (1,2,3). Piston 1 goes in Valve 1, and so on.
bypass valve not opening
your body wont have energy to move around and organs wont function properly
your heart wont work properly and you can die!
the motor wont work properly............
The Cell wont be shaped properly.