This is not a typical question but I hope someone can help. The 4cyl. Motor in the 1989 F150 is a 4BT Cummings engine a diesel of course.The Manual lift fuel pump was replaced with an electric pump I know the diaphragm can rupture causing fuel to get into the oil.The Injector pump seal has been replaced it doesn't have any performance issues and doesn't smoke. I thought if it was an injector leaking by it would smoke and not run very good until the excess fuel had been burned off. I am lost hope someone can give me some ideas, if not thanks any way.
May 20, 2014 at 2:47 PM
