"Jim Wilkins" wrote in message
...

"PrecisionmachinisT" wrote in message
news:jPGdnXN8R9fn_W_PnZ2dnUVZ_hidnZ2d@scnresearch. com...

"Jim Wilkins" wrote in message
...

It would be 180 degrees off, not 360.

It's not a 2 cycle.

The waste spark system fires two cylinders at every top dead center.
Supposedly the uncompressed hot exhaust gas in one of them doesn't
absorb much of the spark energy.
jsw

http://en.wikipedia.org/wiki/Wasted_spark
"a conventional four-stroke engine, this signal must also observe the
phase of the camshaft relative to the crankshaft, so contact breakers are
normally driven from the camshaft and distributor drive. With a wasted
spark, the crankshaft can be used instead, as the system fires on both
revolutions."

Like a 2-stroke.


Semantics....4 cycles go through 720 degrees of crank rotation for each
compression stroke, whether there's multiple pistons or a wasted spark is
irelevant.

That said, it sounds like it's getting fuel, but for some reason the spark
is going off when the intake valve is open....(which may well be perfectedly
expected, IF you have a flooded cylinder and the wasted spark normally
occurs at valve overlap)