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
NinerBikes wrote:
Then the sensor on the rail tells the EDM insufficient fuel prssure, and the car goes into "limp " mode.
Other scenario is that the sieve like filter at the pressure sensor at the HPFP gets so loaded up with swarf, that it overloads with pressure to the return line, that the return line never sees, possibly over stressing the pumps guts, piston, plunger, cam, bore, roller, etc. if that fuel can't get out or get back to the tank, where does it go, where does it get absorbed or bled off to?
Keep pushing.
Ask.. what if the sensor fails?
Read too high, too low?
How are the sensors calibrated?
How do the modulators function?
Is it "on or off" or is it proportional?
If it is a proportional valve, then how is it calibrated?
We need to put a "spy" on those two modulators and sensors to know what it sees and how it behaves... according to the ECM.
