Crazy oil pressure

[ExTREME]

Don't know if this helps, but when I got my DSM out of the garage one day after doing a trans swap I was getting ZERO oil pressure (stock gauge). I fiddled with everything, checked my logger, etc.. I then went down by the DriverSide wheel (front of it) and moved a black clip around on filter housing and fiddled with the wires that were leading away from it. I then went into my car and it was reading good Pressure! Sometimes when I hit a bump it go's to shit too.