Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
The mod that need to happen is a supplemental fuel filter plumbed in between the common rail(s) and the HPFP.
A fairly complicated job, as FEA need to be done to ensure that there are no vibration harmonics etc. that would overstress / crack the assembly / lines.
Physical fit / form factor is also a problem --- depending on the size of the filter.
Another question --- if the filter begins to plug (from debris via failing HPFP), what do we do to ensure that the system is shut down (e.g. have to measure pressure differential before and after filter) and then pre-emptively warn / shut down engine at a certain point.
Major, major engineering fix, and costs will probably wipe out CP4.x vs. CP3.x savings.
A fairly complicated job, as FEA need to be done to ensure that there are no vibration harmonics etc. that would overstress / crack the assembly / lines.
Physical fit / form factor is also a problem --- depending on the size of the filter.
Another question --- if the filter begins to plug (from debris via failing HPFP), what do we do to ensure that the system is shut down (e.g. have to measure pressure differential before and after filter) and then pre-emptively warn / shut down engine at a certain point.
Major, major engineering fix, and costs will probably wipe out CP4.x vs. CP3.x savings.
