fustercluck

there is a pressure relief valve for the afm located in the oil pan, if it sticks open you will loose approx 5-8psi oil pressure to the top of the engine..if you remove the oil filter you can use a long straight pick to unseat the valve and blow out debris. if that doesnt change anything, take out the oil pressure switch and screen below it and check for debris.. if you have access to the oil filter adapter to install a pressure gauge there, that will tell you if the oil pump is producing enough pressure, thats actually where i start but thats usually a dealer only tool that i know of...should have at least 55psi from the pump