87 Nissan 200SX cranks but hard to start
 

1987 Nissan 200SX 6V It cranks but hard to start, has good spark, fuel, battery, it puff's smoke wen it starts doesnot respond it shakes, puff's smoke and stalls, i have to clean plugs from a puffy layer of ash every time, all started wen my sister took the car and did not fill tank! i know basic stuff tune up helped a bit, after thorough testing and some good help, i notised there is a loss of spark, wen cranking the engine, pulled out and cleaned almost all the conectors and plugs, inserted direct current to coil. the car tries to start and sometimes it does! and it feels like a timing issue, it shakes and is very unstable and stalls i can see it turn backwards and puffing though the intake, but all the marks are in place timing belt ok, TDC ok, replaced distributor, cleaned rusted conectors, have veen looking at codes from the ecu, it blincs both leds at the same time only once the green by itself, im guesing 11,23,33,44 and 55 are the codes, hope this is good enough info!
any ideas are appreciated please help! :confused: