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you need to read the live data ideally

worn brushes on the heater motor maybe ? (never worked on a k12 tbh) and try an obd scan gauge for live data reading (sensor voltage while driving etc) i use one of these on my little toyota

yes the sensor generates it own voltage when hot (there are some vids of mine on here, search "bouncing") so meter on the signal wire and earth. then check that signal wire when plugged in also

did you put it into base timing mode when strobing steve ?

141/143 etc is a nats code on obd1 steve, there are a few threads on here

i would check the voltage output from the sensor with a meter (plugged and unplugged) there may be a corroded connector that is leaking out from the sensor heating wires ?

yes, and chains are the same steve, and black ga16 injectors with an adjustable fuel reg to fine tune them

yes try the head on the cga3 block, i did similar stuff http://www.micra.com.au/community/message.php?messageid=65695

you gain some cc from the 1mm bigger bore and stroke steve (5% 4hp maybe ?) 12:1 compression should gain about twice that high compression and wild cams ideally for track use

straight fit, but more gains from the 1.0 piston 1.3 than the ported head steve is it skimmed ?

the o2 sensors can only generate 1v, so i would be looking for a dodgy connection somewhere (bad earth maybe ?)

the k11 engnes (cg) were used on forklifts etc billy, i had an lpg one from a refrigerator pump that had a massive pulley and cam lobes machined down sounds your ma engine was a forerunner for those ? that stator setup s a new one on me the haynes manual s very detailed on your engine

the drive should be the same billy, some of the coils were 9v + ballast resistor tho

cam/crank angle sensor mate the optical disc inside the dizzy if its working you will hear the injectors click and then point to a coil or wire issue no click could point to a coil/wire/transistor/optic/ecu issue

the dizzys usually fail when hot steve, and work again when cooled down there is an injector clicking test in the pdf manual, that confirms if a cas signal is there

birmingham mate, fig owners and grasstrack racers tend to hoard stuff like k10 dizzy,s the later ones were a transistorised type (post 90 ?)

very few k10 members on here nowadays billy, i would try the facebook nissan figaro clubs

there is a 2 digit flashing code on obd1 btw try a search on paperclip

nats only cuts the injector signals mate, so it will run with petrol dropped down the throttlebody when nats fails the link might be for members only ?

its usually the dizzy steve, but only when hot you can get obd1 adapters to diagnose a cas signal https://www.micra.org.uk/threads/tost-the-official-spam-thread.53370/page-63#post-651217