2005 5.4 triton, knocking?
Hello all, I have a 2005 fx4 and just recently started knocking,(always has a little) always change the oil and use motorcraft 5-20. also tried some lucas but no better. It seemed to happen after the truck sat a while(two weeks) and I started it and it seemed to be missing then that cleared up but the knocking continues. could this be oil pump? it runs fine and pressure seems good what do you guys think? and does it just need a tune up? 156,000 miles