If this was my local garage who had done the job (and a most excellent job with my leaking injectors, which had caused severe coking in the inlet manifold), they would be most embarassed by this outcome and would want the car back immediately in order to sort it out.. But I think we can tell from your post that you know that your garage will try to tell you that they have done a marvelous job and there's now something else wrong that's going to cost you even more money! Always use a garage with a good local reputation! Sounds like something simple, though - perhaps a pipe left loose or a wiring plug that hasn't been replaced?

did you disconnect the battery when you refurbed the injectors ? if so the ecu will think that something has been done and possibly you will need to put a diagnostic on it just to check and possibly sort it out .

I would certainly go along with the washer theory this has to be checked out. Another strong possibility is if this injector was left lying about on a bench there's a strong possibility it got contaminated when i remove these i always use a small sealed plastic bag to eliminate this from happening. I would remove this injector again ensure correct sealing washer is used get the spray pattern of the injector checked Hth Regards Mickeybo