MugenFlaredCRX

I'm having some problems with oil pressure with my zc powered crx. the car ran perfectly one day, then i took off the valve cover to get it powdercoated. got it back from powdercoating, got brand new gaskets all around, changed the oil. and now its running like ****. the oil idiot light on the dashboard flickers kinda fast about the same as the speed of the engine and also the engine ticks. i have no idea what could've caused this. i need some help.