hello experts
i have recently changed my piston rings and valve seals, so after that my oil pressure light was correct for 3 days, then not worked, so after one week i changed the oil pressure switch, now the problem is that the switch sometimes work and some time it does not work properly, in other words sometime when i switch the ignition switch ON the light is also become ON and on startup it goes off normally. but sometimes at ignition switch ON it does not become even ON. please help