996SPS
Junior Member

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ducati with P8
Posts: 60
Finland
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some progress;
I have a hard time understanding why this thing does not start?
I've tried TDC=0 and TDC=1, I've tried low amounts of fuel, I've tried crazy amounts of fuel(all the corrections and parameters on top of each other make it complicated.)
I tested with JuhaV the original WM ecu and it fires both injectors at the same time during start up. We used an oscilloscope. The MyECU does this too, right?
the thing is, that since this machine is originally a poor starter (due to small starter, bad starter ratio, high compression, battery, etc.) I really do not want to stress the system any more than I have to. I really do not want to break/fry my starter, starter sprag wheel, etc.
We tried all sorts of map combinations (we changed e.g. InjVOn, Crank, Prime, etc..)
and it still would not start. the engine was warm. I had ridden it with the original ecu prior to our tests.
and, when I plugged the original ecu back on, it would start instantly.
CO, Idle, TPS and balance are set spot on.
Next thing I will do is solder the second injectors parallel to the first ones. It looks like the WMP8 is using them all the time. Maybe the fuel atomization will be better at startup, once both injectors are firing and the injector sprays meet in the middle, just under the butterfly. Now, with one injector, it probably just squirts directly to the opposite wall.
also, need to really check the timing of the injection vs. the spark. when does it REALLY happen on both the original ECU and MyECU.
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