Try to:
-detach both battery cables for a few minutes (hold them together a couple of seconds)
-unplug/replug all sensor connectors
(cranksensor, TPS 2x, MAP -sensor, ECU,.....)
Try ECU sync:
-ignition off
-throttle once full open and close
-ignition on
-for exact 8 seconds throttle full open
-throttle close
-ignition off
Jump start battery from a car, does it last ?
This 700 motors are known for failing CPS (CrankPositionSensor) and faulty Camshaft Position Sensors, both going south at early kms.