Wife and I went on vacation with our 5th wheel RV. (18K lbs) We had a fuel injector go bad (white smoke, rough idle) The truck limped about 2 miles and completely shut off.
Towed the truck to a Ford dealership and they siad I need :
new fuel injector (#6)
They said because the injector seal blew the injector vibrated and scrathed the cup surface. They said to replace the cup.
My diesel mechanic back home said he rarely to never sees a bad cup and the dealership is milking me.
I told the dealership to install a new (rebuilt) injector (which my mech. said I did not need - the one in my truck could be fixed)
IS IT TRUE THAT A BAD INJECTOR CAN CAUSE THE CUP TO SCRATCH AND CAUSE THE INJECTOR TO FAIL REPEATEDLY?
I have 129K miles. The head gaskets, ARP, EGR delete was installed 5K miles ago. The heads were milled and leak tested. All was OK no problems found