97 z28 80k on car 20k on motor i have good oil pressure most of the time the gauge reads between the 1/4 and 1/2 line at idle and between 1/4 and 3/4 line while driving but if i brake hard it will drop down to zero for a second or two then come back up to normal i am not low on oil and i do not hear any knocking or anything from the motor when it happens could it be just a faulty sensor

 

yes it could be bad sensor, wires or gage. you can set up a mechanical gage to see if its accually doing what you say. if the pressure is dropping it could be a couple things. poor connection at the oil pickup for the oil pump, oil pump failing, failing oil filter, fram makes a filter these motors dont like, plugged oil journal.

 

fresh oil change mobile one and filter not a fram and it did it with the old filter to where is the oil pressure sender on these motors

 

97 lt1 should be behind the intake manifold. yep way back there where is a pita to get to. mine (old style) is on the side of the motor above the oil filter.

 

well cant be any worse the the o2 sensors and spark plugs give it a try gotta get to it to hook up a mechanical oil gauge any way

 

there is a oil journal outlet above the oil filter. you can see were my oil pressure sensor is, thats where you can hook in a gage.

 

see that plug right below the egr thats where your sensor should be.

 

thank you i will hook up a gage and see what happens

 

Hmmmm, I sure hope whoever rebuilt the engine didn't leave the windage tray out. Without it, whatever oil that's still in the pan could go sloshing forward, but the oil pump pickup is in the back.

 

well ive only had the car for a couple of weeks so it wasnt me but i think you hit the head on the nail camaro 69 there is deff something loose in the pan that rattles if you pound on it know of any post on dropping the oil pan cant be that hard ive dropped the pan on my 93 f150 and let me tell you that was a real pita had to remove the whole intake and lift the motor up almost 6 inches and still had to find that sweet spot to get it past the tranny and cross member damn fords with that twin i beam crap