The ticking time bomb under the hood
Two of my friends had the Bosch CP4 high pressure fuel pump grenade in their 2012 F350s with the 6.7 liter Diesel. It took out the entire fuel system and injectors. Both trucks had over 130,000 mil...
Forum Discussion
wnjj wrote:Kayteg1 wrote:
I would only highlight again, that the bypass kit does not prevent pump failure, but protects injectors from the debris.
I still think that knowing the pump failure happens at 160-180k miles, the proper maintenance would be putting new pump at 150k.
True, with one possible exception: With a lift pump, you may be less likely to starve the CP4 for fuel, which is what causes the destruction. The lift pump will push fuel into it rather than depending upon vacuum to pull it. I don't know this for a fact...just speculation.
This the way my Cummins is. There is an overflow valve that sends excess fuel back to the tank after it has helped to cool the injection pump. We have to maintain a minimum of 14 p.s.i. to keep the overflow valve open and provide maximum cooling. I also now believe this discussion about cavitation has a lot of Merit. Thank you for that.
I add TCW 3, 2 cycle oil in the fuel, equal to 1 ounce per gallon of ULSD. Tests show it gets it to Bosch specs required by lower scoring values. This I don't know if applies to Ford Bosch injection pumps.
