Yes and yes. The dripping is observable. I think a drop /minute is ok. I
dont remember where I saw the specs on this.Maybe Bentley.I did this test
with a pressurized injector.I pumped it up and watched for dripping withour
applying the 12V. Some dripped and some didnt drip at all.All were within
specs with an unknown amount of pressure.This pressure was enouth to give a
nice "cloud" of vaporized fuel. Anymore pressure gave little difference in
the cloud.

 For some forgotton reason, I once left the 12V hooked up for many minutes.
The injector got hot! I unplugged it and then let it cool(long time). I
continued on with my cleaning and reinstalled the injector.I thought my
experiment had roached(yet) another part. However,it has worked for a year
and a half,and continues to be just fine.I,on the other hand, should have
been burnt to a crisp with all the fluid that dripped out.This is why I say
use the origional connectors from a junkyard, and  have the garden hose
turned on, and nearby. I just wired them,jerry rigged style, to the battery
and surely got sparks.

The cloud of fuel is beautiful and you will know when the injector is
clean,without doubt.No,you cant measure fuel flow or anything, but with a
clean injector, you should get "like new" preformance.Perhaps a better
quality bicycle pump will have an integral pressure gauge.I think an
injector needs about 30psi.Very doable with this pump.