So I had precision pickups put in my ibanez bass and then the active electronics were disabled so now the bass operates just like a passive precision. Problem is sometimes when I move the chord or just move it makes a terrible crackly noise. Tried numerous chords and a few amps and get the same problem so it must be the bass. I have had a few different techs and luthiers look at the bass and unfortunately the bass was not making the noise when they tried it which led me to believe it was my chord or amp but again I have ruled those out. Put a new jack in and that did not solve the problem either. It happens sometimes but not all the time, but when it does happen it happens when I move the chord but the notes do not go silent it just creates a crackle noise. Tonight me and friend took off the back cover and for some strange reason the crackle noise went away when I was moving the chord around. We put the cover back on and the noise did start to come back but it was not nearly as bad. What the heck could this be? Could there be a sort of static charge in there and then when the cover came off the charge got released? I had the bass doctor in chicago double check the wiring and he said it looked fine to him. Oh and i did spray some of that stuff from GC that cleans out the dust and stuff that can make this type of noise but that does not help. Any ideas please? Thanks much.