Eric,

Not so much of a what do you know, but more of a spitball approach to the bullshit I had to put up with on the audi tdi.

The incessant "all parts that touch diesel must be super clean" or "you have to replace EVERYTHING" mantra that I received from the tdi forums. Even a hint of wanting to clean and reuse the in-tank pump led to a cry of shame. This is what led to my supercleaning all of my stock lines and replacing the stock injectors with a used set of a 2009 jetta tdi.

Only to be told later by a cummins guy you could have gotten by with just replacing the HPFP and the FPR. His quote "It's only diesel, not rocket science."