I have a 94 chevy C3500HD, I just put a new oil pressure sender/switch on about a month ago. It never seemed right after it was installed. It doesn't bounce around but has what I can best describe as a tick in the gauge (it will move in a fast motion in either direction real quick then be fine for a while). The other thing it does is to react slow or not be in the right place depending on rpm. I have oil pressure and it is where it shoud be at any given rpm, it checked with a mechanical gauge. Is my brand new sender a piece of sh#t? Thanks

 

did you check your grounds

 

Checked all the obvious stuff and all looks good there.

 

did you clean them so they were nice and shiny. wierd stuff happens to these trucks when it isnt grounded properly