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:
Lots of watts generated by losses..anyone now the power consumption
of this pump?
That alone begs...what is the MTBF of record for this thing?
No idea the power involved, but it sure ain't zero to get that much fuel pressurized plus cooling losses.
That is another clue... failures clustered around summer, when fuel in fuel tank is hottest.
I am willing to guess that there would be a very hot run with a near empty tank (minimum thermal mass) that factors into the failure.
MTBF design basis must be around 250,000 miles, or over 400,000km because Ford bragged that they tested that.
Note a slight lag between the "event" and the subsequent catastrophic failure --- suggesting the damage takes time to work before it bombs.
Actual MTBFs have been as low as 30,000 miles / 50,000km range on the units that experienced failure.
But on units without trouble... they don't have any problems.
Something says there is a causal agent --- it is not universally bad, but something unique to the failed samples.
