Monroe air shocks

Spray lines and fittings with soapy water and find the leaks.
I've done this as well and replaced the lines . Mine lines are only 24" long each going into my trunk. It's got to be the shocks just can't handle that much psi like they claim . Also I've never been able to put 150 psi in them I got 115 once and 100 the other times as that's the max thr Firestone next to me can put out . Takes a few weeks and it's down to 75 again and basically at stock ride height