Ok i figured i should post this since it has me (and others) stumped. It is believed that i have cracked heads but before i could find replacement heads my truck has developed an oil pressure issue. I parked the truck, turned it off, and tried to start it about 10-15 minutes later, it fired off and quickly died, so i tried again and i had an extended crank but it finally started. The truck falls on its face over 3k RPM, and now it always has extended cranks. The scanner showed good ICP, we put a mechanical gauge on the oil filter housing and it showed what looked to be 0 PSI AT IDLE! (the gauge might not have been the most accurate since there were no lines between 0-50 PSI) Even when we ran the RPMs up to about 3k the PSI never reached 50. According to some reading i did awhile back the truck shouldn't even start, let alone run. We have changed the LPOP and the pressure regulator, next will be the HPOP and IPR. However, i have a feeling it is a low pressure issue rather than a high pressure issue. I'm open to any input, i am out of town and have been for about 3 weeks, the truck is at Logan's and he has been driving it a little to see if any other problems arise. So lets hear what you think! Thanks in advance!