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...
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An interesting post:
Original Post
Now it is pretty plausible that at the onset of failure the pump will begin to lose pressure or have pressure fluctuations which are measureable.
That can warn of a failure --- if somehow detected and understood --- and cause the vehicle to go into limp / shut down and repaired before metal particles destroy the injectors etc.
Another interesting day in damage control.... after the problem began.
From VW TDI wrote:
I was at local car meet this week and we had a new member come by because he moved in town recently and he is the TDI specialist now as one of the local VW dealerships. I was talking to him about the HPFP issue and he brought up that all cars that threw check engine light or stalled prior to the hpfp failing showed mbar difference between requested and actual pressure over (I THINK HE SAID) 150mbar. He was telling me that when he went to a class over the HPFP stuff a few months ago they mentioned that they are working on an check engine situation that would throw code when the pressure of fuel pressure showed degration of the injection pump within a certain tolerence and make the car undriable. COMPLETE LIMP MODE... as right now if the car throws code for crazy fluctuations in fuel pressure now you can still drive the car but the glow plug light will just pulse...
He said all vehicles that they seen 150mbar+ difference that they swapped HPFP under warranty never passed metal through the entire fuel system ruining it. He was saying if an gauge company was able to make an gague that displayed actual and requested fuel pressure difference it would be vital gauge. He said the pumps that were on there way out struggled to even make reuested pressure at idle yet alone any other rpm... just food for thought...
If anyone is good with electronics could make a simple display with a buzzer possibly to achive this may be able to save people thousands of dollars.
Original Post
Now it is pretty plausible that at the onset of failure the pump will begin to lose pressure or have pressure fluctuations which are measureable.
That can warn of a failure --- if somehow detected and understood --- and cause the vehicle to go into limp / shut down and repaired before metal particles destroy the injectors etc.
Another interesting day in damage control.... after the problem began.
