2005 Audi A4 Quattro S-Line 2.0t FSI


Does anyone know what the voltage should be at the two terminal connector at the top of the High Pressure Fuel Pump? I'm getting 9.3v


The car turns over, fires for about a second and a half and then continues cranking with no result. It runs for a few seconds if I spray starting fluid into the intake. I'm suspecting the HPFP as it seems like a little bit of gas gets to the injectors, enough for a combustion cycle, but that's it.


I've replaced the green fuel pump relay (644 printed on the back) under the ECM, checked the fuse (28) and verified that the in tank pump is working. I've also replaced the fuel filter.


I've pulled the HPFP and the cam follower is worn but not catastrophically. Obviously I'll replace it.


Thoughts?

 

A Part Two Speed Test would be nice - leveraging the basics of the first video, get into more details on why HPFP fails, PCV fails, et cetera. Also a lot of turbo enthusiasts are upgrading cars with greater PSI, etc. You could cover some basics on how upgrades further strain some of those systems. For example, important that fuel, PCV, and ignition systems are up-to-date and in top condition.