First I would like to put a word out to those referencing ficms. There is no ficm on this truck as you probably already know so you can disregard the theory about how the ficm controlled injection systems operated.

Is there by chance a bottle of diesel kleen 911 fuel treatment in the truck or could you ask the owner if that or any other emergency fuel treatment has been added to the fuel since the modification work was performed? And what lift pump system is on the truck and does this have spin on filters?

Brendle Strites
Owner/Technician
Strites Auto Service
Clearville, Pennsylvania, USA