What are the symptoms of a clogged / partially clogged fuel pump strainer? I’ve got a 97 1FZFE. Have replaced the short block, head rebuilt, and most bits around engine replaced- all OEM parts. However, I’ve never touched the fuel pump or strainer. I’m guessing the pump and strainer are original. The truck has 226K miles on the odometer. If the pump and strainer are original, and they fail, is the failure all or nothing, or is there a slow progression toward complete failure?