03 Dodge Ram 1500 5.7 hemi oil pressure loss
I am working on an 03 ram 1500 5.7 hemi. Same as everybody else it has loss of oil pressure at idle. I have replaced oil pump, oil pressure sending unit twice, used a mopar brand 090 oil filter, after doing oil pump pressure was fine until engine warmed up. Then dropped pressure again. The very first time it happened was out of the blue dropped to 0 while driving engine shut down coasted to side and called tow truck. If you bump idle to 1000 rpm oil pressure guage reads normal at about 850 it drops to 0 again. I have same problem using 10w30 or 5w20. Any ideas?