Maybe the Gasoline Filter in the Rear ??
Do you change him sometimes ??
Check in the Moment when the engineget out of run , the Spark ignition .
Do you have in this moment 12 volts on the Ignition Amplifters(Point 15) ??
Can you read the MistakeEprom (i dont now the Words in Englisch) ...
Put out the Oxygensensor . The black cable from the three in the same place how the tdc and RPM sensor are .
you have no conlog ???