- Mar 25, 2005
- Back in So Flo - St Lucie
- '05 Golf - totaled :(, wife's '13 Beetle - buy back, TDIless
I have now talked to a couple different people on the subject and the consensus is the piezo crystals in the injectors shatter and the resulting debris chews up the HPFP. No doubt a stronger pump wouldn't have grenaded like the CP4. Part of the back up for this statement is to look at how many Passat CR have destroyed a HPFP, knowing that the injectors are NOT piezo on those cars.My fuel looks very clean other than the metal shards in it, so my guess is manufacturer defect. My filter was just changed 15k ago
I don't know why VW is so mum on the subject, but probably has to do with liability for the couple hundred thousand Jetta/Golf/Beetle TDIs that use that injector. Admit a problem and its DieselGate 2.0.
BTW - Highlighted in red, you need a scan tool to properly purge the air bubbles from the fuel system after changing a fuel filter. I watched a "know it all" tech just crank the engine until it started. In the process air got into the injectors and they failed. Some scan tool readings with tech line and an engineer found the failed injectors.
My take on it is they are a weak point that may fail, so don't temp fate. Purge the air like repair manual says and avoid the headache.