I addressed that in my longish post the other day.
I talked about how many times and intake valve opens and closes per second
- it's a lot.
( 4,000 rpm = 2,000 cycles per minute divided by 60 seconds per minute  = 33
times a second, for each valve to open and close, each second at 4K rpm ) 

in the overall scheme of things .....and the injector is held open a matter
of milliseconds at a time......there isn't time for fuel to pool, put it
that way.
Scott
www.turbovans.com 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike S
Sent: Monday, September 17, 2007 6:09 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Rich on side, lean the other?

At 08:44 PM 9/17/2007, Michael Elliott wrote...
>What I've asked the group twice and not gotten an answer on: three out
>four times an injector fires at a closed intake valve? And the fuel
>pools
>up or something until the valve opens and sucks it in?

Injectors in good condition put out a pretty fine mist, directed
straight at the intake valve. It doesn't pool, or the FI system
wouldn't work very well.