Hello. I have a 2008 GTX 215, i had inspected both oil pumps, cleaned the filters on both pumps (they were SUPER clogged), checked the pressure release valve, no clogged, no metal parts in tehre, oil level ok. At idle it runs fine, when i give it 2500 rpm after a few seconds OIL warning. I have an oil pressure gauge connected to the top of the head (removed screw, plunged in there). When i removed the screw oil came out so this tells me that oil is traveling upstream into the head, still the gauge indicates zero absolute pressure when the engine is at idle and then zero if i rev it up. Could it be that both my pressure gauge and the oil sensor are bad? What is the next step you recommend to do on this issue? Thanks