more DIS questions

[Shannen Durphey]

W
> Wasted spark (also called maverick spark) designs fire every plug every 360
> crank degrees. Once when each is supposed to be fired, and once near TDC on
> the overlap. The spark on the overlap is what is called the wasted, or
> maverick, spark. Since all plugs fire twice per four stroke cycle, cam
> position doesn't matter.
Don't need cam sensor for non sefi, but still need reference point to
start coil sequence.  Since cam sensor delivers a synch signal, it's
easy to think no cam sensor needed means no synch signal needed.  4
cyl DIS signal goes straight to the module, and begins with cyl 2/3
coilpack.
> 
Shannen
> 
> Agree that  for an ecu running SEFI AND a wasted spark DIS, cam sensor is
> needed for getting the triggering of the injectors timed right. But--for
> DIS ONLY--no cam sensor needed.

> 
> Greg