Seems that you are not getting spark for ignition, but gas is being
delivered to the cylinder.A bad hall sender or hall generator are my
guesses,but a wire rubbed raw seems most likely. Hot or cold this, problem
remains? Many times the heat after warm up will reveal a fault in an
ignition component.Problems,then appear. Heat may cause expansion in a
component,and then the short circut may reveal itself.This dosent seem the
method of the current madness though.  A bad coil comes to mind here.First,
I would clean all the electrical connections I could find.Check all the
wires from the distributor connection,back to the hall sender , and to the
coil.Could be an issue inside the distributor too. I am also guessing that
the ecu thinks all is well and is delivering the gas signal as
promised.This signal gets Shanghide(sp) somewhere between the ecu and the
spark plug.I dont know 2.1 engine components,so, as usual , you are getting
what you pay for here.If you have extra parts, swap em out.A trip to a
junkyard can get you a distributor and all these components mentioned
above,for far less that a repair shop will charge just for a reasonable
diagnosis.You will then have the parts for a friend or for when your
vanaogn has its next episode.Shouldnt take long for this  to happen.Wots of
Wuck.