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
ricatic wrote:
Interesting development with the injector electronics...a very good friend of mine, an Electrical Engineer, was a lead designer for the injectors at Bosch. When my injector failed in February 2011, he told me about a known circuit board issue that they had after releasing the design to production. He was right on with his description of the behavior of my truck as the injector intermittently posted a CEL. Is it related...do not know but when I see him I will ask.
Unfortunately for the Bosch discussion, he has taken a major job advancement and no longer works for Bosch. He is now a lead engineer at a major player in the development of hybrid car motor and battery components.
Regards
Very often, when electronics fail, they send a surge through the circuit.
That may be sufficient to fry other electronics, including breaching tightly speced insulation and shorting to ground... or other bad news.
I want to know... are the two failures related?
Could a frying injector (no circuit board per se, but piezo electric crystals stacked up), short to ground... and in the process... with a bad ground from injector to engine / chassis, have the current flow to common rail then to pump as the path of least resistance?
Precisely, what is the failure mode of the piezo electric injectors?
Do they "burn" as one element fails in the stack?
Do you have a disassembled injector for us to see what is the circuit board or piezo electric element stack?
I need more info.
Electrical surges like that can pierce the coating --- or expose the pump to something it was not built for.
