Bought a New rebuilt Pump from Rick put the pump on the truck it ran like *** . Called him said I had it out of Time _-ucked with it for a few weeks off and on NO LUCK hired a Retired Certified Cat mechanic with 38 years of experience to look at it . He couldn't do anything with it ether BUT He did discover The Pump was Dumping fuel in the OIL I mean a lot . Basically He saved my engine . I took the pump off Sent it to Diesel Injection in Louisville, Ky They "Rebuilt"" My Rebuilt Pump" that Rick Sent me. Got pump back from Diesel Injection Put Pump on the truck and set the Timing Like I Had done" previously " Results the truck literally Runs, Like a Striped *** Ape!! This Guy Has a spot in *** User's recommendation: If you Like spending Time And 3 Times The Money Then you have found the Right Place to Deal with.