Shop Talk: Tech Tips from a Lifetime Under the Hood…
Question:
I have a 6.7L Ford that is blowing fuel out of the top of the injectors, on one bank! Didn’t you tell me about a fitting that gets stopped up and causes this?
Monty’s Answer:
If you put some DEF fluid in the fuel tank it can plug up the injector return line. However, it will most likely break a plastic tee in the fuel return line. The return line has 53 PSI plus of fuel pressure.
Before I install injectors, I would check history of the truck. I would also check for contamination, metal flakes in the fuel system and replace the return hose assembly (this is a must).