anyone ever heard of "diesel purge"? i read about it in a vw parts place catalog and some kid at school with a tdi jetta swears by it. evidently it is a german product, made in germany (at least thats wat the bottle says) and your run it raw. straight out of the bottle you put the supply and return line to and from the injection pump right in this bottle, fire it up and it takes about 15 minutes to suck dry. it smokes like a bastard but supposedly clears all the built up shist in the pump, lines and nozzles.