Report "I have a 2008 f150 5.4L 3V that will start and idol smoothly for roughly 6 to 8 minutes and then lose all oil pressure and start idling rough missing and knocking once in a while the oil pressure returns for a split second and then drops to nothing again.... I've removed oil pan cleaned pick up tube replaced oil filter and added new oil still continues to do so.... It seems that every time it does it that it completely drains the battery of all its power possibly leaving enough volts to start it one more time before completely dying and continues to do so over and over each time I boost the truck to troubleshoot some more same problems occurring each time"