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I'm gonna try to help you solve your issue, but first I need you to tell me what year and model is that Jetta you're working on. Also, what engine is in it (AWP, AVH, etc.)?
OK. The FSI system has lubricity problems that accelerate wear on the high pressure fuel pump, cam, etc. Volkswagen knows that and has extended their warranty on the FSI system to 10 year/120K miles, so you might get this issue resolved free of charge. Give your local VW dealer a call and find out.
Slow down... ;-) Please read my 2:40 PM post. it has some potentially good news for you.
Sorry to hear that. Well, at least you know now the pump needs to be replaced and the cam lobe inspected for excessive wear.
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