Shop Talk: Tech Tips from a Lifetime Under the Hood…
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?
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).Tech-Tip-Ford-6.7-Powerstroke-blowing-fuel-out-of-the-top-of-the-injectors….._Sep_30_2015