Half open Injector?

[thomas walter x5955]

Dan,
Marc has already posted some good ideas on what to check. Also,
if the injectors seem to be 'buzzing' they maybe be a low impedance
design and require too much current to open.  The driver will shut down
if the injector takes too much current - hence the buzzing (rapid
open and closing of the injector as the driver turns on and off).

Cheers,

Tom Walter
Austin, TX.