Hi all I have a 2004 Jetta BEW, and a couple weeks ago it started running much like it was misfiring on a single cylinder. This started immediately after refueling, almost a whole tankful, from a station I was not familiar with. (bad fuel?). Since then, I ran through that tankful, and refueled at a station I know to have high diesel turnover, that I use often. No improvement in the misfire. So far, I have changed Air and Fuel filters, checked intake manifold (not as bad as I expected), cleaned the EGR diverter valve, and said a few incantations over the engine. Still no improvement. I had the valve cover off to check connections to solenoids, and they all seemed secure, but I did not remove and reseat them...(actually I didn't know how to get 'em off the injectors, and didn't wanna break something). Because it behaves as a single cylinder misfire, I suspect something related to a single injector. I have not run Vagcom on it (no cable), so I don't know what codes it may be throwing. What next? Thanks Mark ps: I'm highly incentivized to get this sucker fixed, because until I do, I'm in my backup car, a 1990 Volvo 240, with a passenger window that won't go up, no radio, and no power steering! (driven for two years by a teenager as his training car) Ick....what is this goo on the seat.....etc.