Hi there guys. I have a 2008 Mazda Tribute 4 cylinder 5 speed. Recently it has started misfiring so I replaced All 4 plugs and three of the four plug wires as well. It seemed to run fine today until late this afternoon when it started misfiring again. Put the code reader on the car and it came back with a code p0191 and supposedly this is for the fuel pressure sensor. Has anyone else had this problem and no how to fix it. Any help would be greatly appreciated.