Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
How can an AC system have a leak but yet still holds some kind of pressure?
Happens all the time. Like Ben said, small leaks in an A/C system are common and might only leak under specific conditions. For example, many refrigerant leak detectors will accurately detect a leak of around .25oz/year, but some leaks can be much smaller than that.
