G16 misfires there are over 50 causes,
do you have tools? and gauges, and meters?
overheated before, so not now right?
new engine, so compression over 170psi, ? at sealevel?
seems its not in USA< right>? (if not , the many parts are different that is why I ask country)
our 95s are called sidekicks and trackers.
im guessing you are in canada posting to a USA forum?
jerking and cutting out. when?
hot engine cold engine, or both????
idling in park (is it AT? trans?)
idling in drive.? misfires,. at all times.
driving in gear,? only.
cruising, only misfire?
does it misfire, accelerating or wide open throttle. only?
only up hills , only in some gears?, only in turns,
ECU operates in many modes, (as above) and these facts aid diagnosis big time.
or is jerking and cutting out not the engine, but the 4 speed trans doing that. as any AT sure can do. (gear, flare ,gear ,repeats)
27 reason just here.
http://www.fixkick.com/misfiring.html
my guess, is battery is 13.3 to 15vdc running.
that it's bad spark got new cap,rotor wires and spark plugs.?
old 21 year factory HV wires are helpless, get some BOSCH mag wires, on this G16, best there is for this weak spark engine.
did you gap the stock class plugs at .028" or leave them at NGK .045"
which is wrong, dead wrong. are the plugs OEM plugs stated in the NGK catalog, free to read online? or what ever brand you use?
Did you time the cam right.? not using the false markes on cam cog?
did you then after that, time the distributor to 5deg. btdc or as your book states? using the timing freeze jumper and the timing light?
some are 5deg others are 8. degrees. depends on state or country.
if i knew all ways it misfires, id be more savvy but dont.
good luck..
PS:
id pull all 4 sparks out.
1: color, is tan? ok,.
2: coal black.?
3: black oil soaked.?
4: fuel soaked. even dripping , injector stuck open. on 1?
5: green antifreeze soaked.
6: damaged.
1 bad or all 4 or what, this is called READing the spark tips
and is a HUGE CLUE.