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
NewsW wrote:milsuperdoc wrote:
Does anyone know if there's any other studies or attempts to replicate or discredit the Spicer report since it was done?
Yup.
The test done has no relevance to operating conditions of 2,000 bar and 150C normally experienced in a Diesel fuel pump circa Bosch CP 4.2
Same reservations noted in ASTM D975
And other studies I posted.
Yep, and that is the crux of the matter, Bosch did not test diesel fuels world wide under actual operating conditions before releasing this pump, and they have clearly discovered that a High speed reciprocity ball test under load has no resemblance to the fuel requirements for their HPFP under actual !50C 2000 bar fuel rail temperuatures under the hood of your truck or my VW Touareg or Passat TDI. I also have a sneaking suspicion that diesel fuel with low aromatic content of less than 10% or 5% as required by CARB in high density city transportation/population areas may very well aggravate the wear problems, versus high aromatic content diesel fuel sold in non populated, and non polluted areas.
