Ion Owners Group
Follow these direction to pin-point the leak.
Step 1 : Disassemble the marker. Separate the trigger frame from the firing assembly. Remove the battery, eye board, eye wires, body shell.
Step 2 : With the shell still off, reconnect the mid banjo or qev to the breech and reconnect the rear banjo to the donut. With the trigger frame still separate from the firing assembly, reconnect the front banjo to the trigger frame ASA port.
Step 3 : Turn down your reg and air up the ION. Increase the pressure to about 100psi.
Step 4 : Listen for the general area that the leak is coming from. Mix a bowl of 25% dish soap and 75% water and apply it to the leak area with a q-tip. Bubbles will form at the exact point where air is escaping.
If the leak stopped with the firing assembly off the frame, the common cause is bad hoses. Try gently pulling and pushing on hoses to try to determine which hose is causing the leak.
It is common for the frame to push on the rear banjo when it's assembled, causing the rear banjo to leak.Try shortening the rear hose by 1mm. Make sure the cut is clean and straight. If you still have it, try replacing the rear hose with the spare hose that came with your Ion. Also, you can try swapping the rear banjo with the front banjo.