I'm not sure, but it seems to me that the injectors have some type of
resistance in the wiring harness or ECU to limit the current.
IF this is the case you might want to be a little careful about
connecting them to a full 12V for very long.
  This cleaning scheme does sound rather clever tho.  I wonder if it
also reveals dripping if an injector doesn't close properly.
Larry A.

Roger Sisler wrote:

>Very nice and systematic mechanical work(for a vanagon). I also have a
>hammer in my tool box. If your injector is ok, but plugged up, it can be
>cleaned. Once removed, Put about 1 tbl spoon of concentrated injector
>cleaner in the little 2 inch hose that is attached. Next carve an  old
>rubber tire valve down till it can be stuffed into the hose. Clamp it. Now
>put an electrical connector(junkyard) on the electrical hookups on the
>injector. Hook up a 12V battery. Lastly, hook up a bicycle tire pump and
>force the cleanter through the injector.You can probably visualize this set
>up,and that a water hose needs to be nearby( I had no fires with 8
>injectors). Takes about 2 refills to make sure the injector is clean. A
>nice cloud of cleaner will form when pumped,to tell you the job is done.New
>injector $50,used,$8.
>
>
>