If the fuel pump has been run recently there will be pressure in the
fuel lines.  However, even then, the volume of fuel that would be lost
will be small.  Less than would be expended doing an "Injector spray
pattern" test.

Mike

Michael Elliott wrote:
> A brilliant and obvious idea!!!!!
>
> Like -- duh!
>
> I know that the fuel lines going into the injectors are high pressure. I
> could use a pointer to a tutorial on how to handle the hoses when I do
> this swap.
>