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
BenK wrote:
Always wondered, but haven't had the time nor inclination to noodle it
out on how those injector orifices keep from carbonizing/choking shut
Must have residual fuel being pushed back by the combustion process that
then is the 'plug' that keeps it clean enough for the next million cycles...
Or the injection of fresh fuel is sufficient to eject any deposit buildup.
In gasoline injectors, at much lower pressure, they can get clogged.
I don't know if there are coatings used on the diesel injectors.
DLC is used in the injector plunger for at least a decade --- definitely on the Siemens HEUI unit injectors, but I don't know about the Bosch piezo electrics.
I have not heard of widespread issues with the DLC unless it is referred to as injector stiction.
Siemens sold the diesel injection to Continental.
