93 Sidekick Floods and stalls when warm

[fixkick]

if code 12s and it floods, hot.
then first check for coolant that is not hot, (180f or more is hot, below 150 is bad news) we check for hot first. with and IR gun.
If it really is hot, then the ECT sensor will read (unplugged) about 300 ohms (ohm meter checked at ECT 2 pins)
the ECU only reports ECT shorted or dead open,hard fails, not reading way off, errors.,

you said new heat sensors, there are 3.
ECT at thermostat housing. engine coolant temp. (many times folks replace this and get the wrong one, SUZUKI has many and so easy to do or buy china clones that are junk)
IAT (on air cleaner box, but some 93 have none)
and dash 1 wire sensor for H<>L engine temp.
next is O2:
O2 sensors new, fails too with exhaust leaks or wires to it wrecked, taKE OFF THE heat shields yet and see if #4 exh. tube is cracked,? as most are, on the 16v but never on 8v.
the O2 if it sticks at 0v out, the engine goes horribly rich. In most cases the ECU will not warn of this...(unlike newer cars do , 96+)

there is no OTC scan tools for this car, so we must do tests to find out of ECU is confused and way, with meter. and such.

this can suck air (putt suck putt suck putt suck air)
if its not too bad its ok, if it sucks air the 02 rails.
rails means slammed to 0volts DC.
0v = rich as pig.