The injectors do fire in time with the engine position. All 4 injectors
fire once every hall pulse which happens every 180 degrees of crankshaft
rotation, so twice for every engine revolution. The ignition spark is by
definition according to engine position and the fuel injectors fire
based on the same triggering event that the ignition uses. Of course the
ECU adjusts the ignition point to optimize it. The ECU also cuts off the
injection pulses when conditions dictate, such as going down hill with
your foot off the gas, assuming your throttle position switch is working.

Mark

Scott Daniel wrote:
> minor correction ...waterboxer injectors don't turn on 'every
> revolution' ..
> They are triggered continously in pulses...or in 'injector on time, in
> milliseconds of duration.'
>
>   - as one big 4 part injector too btw.  Called batch fire.
> Not sequential, not timed to engine or piston position.
> Somewhat crude.
>
>