Hello diesel Enthusiast,
I am the owner of a 1994 f350 7.3 litre turbo diesel which I love dearly, so here is the problem i'm driving down the freeway and the truck starts slowing down all by it self to 50mph and will not go over that, I get it home gety out my jump wire so i can read the codes through the check engine light and pull up codes 128 and 512 the i pull the valve covers and replace all the injector harnesses and the glow plugs too just because, ibutton every thing back up start the truck it purrs like a diesel i go for a test drive truck will not go over 40 mph, get it back to the driveway it dies and will not start. Can anyone help me on this issue.