Same problem in warm weather,runs fine when outdoor temp below 50

Ranger not ford f100 Ranger.
When did it last run perfectly, last week, last decade or? never seen it run right..
lots of causes over up to 50.
I gets warm means engine,or outside air? temps.

so the spark plugs are bad or fouled. replace those old HV spark wires now.
it's over heating? the engine.
bad fuel
the classic answer is
bad engine, bad spark, bad fueling , in that order
or is the cause (or EFI failing)<< sensor etc.
this USA car (if is ) can OBD2 scanned easy, scan it.
do you want us to guess,? only.
or do tests, will you buy test tools to solve this?
there are tests for each cause of failure.
die out we call stalling engine,
when it wants to stall, can the fast right foot save the stall?
I guess car engine starts and runs cold? every time?
ever get a turn up,

engines 1996, diagnosis is best done, knowing first what is there,

2.3 L OHC I4, Pito LL23 4 cylinder but 8 spark plugs, yes.
3.0 L Vulcan V6
4.0 L Cologne V6

so when dead, and warm dead, check for dead spark?
check engine compression above 150psi on all cylinders
check fuel pressure when dead./

I think your mistaken. Your battery will lose cranking power as the temp drops. Warm battery may work just fine, untill it gets below freezing temps then the cranking amps are so low its sluggish. Buy a high cranking amp battery and you will be good as gold mate!

Could be water in the fuel causing icing up in throttle system. Try running some heet in the fuel tank.

DOES YOUR CAR STALL OR DIE AT A COMPLETE STOP? SPUTTER FOR A SECOND OR TWO WHILE DRIVING, RPM GAGE PEG OUT THEN ENGINE SHUTS DOWN? YOU HAVE ANY MORE SYMTOMS?

I would get your engine temperature sensor checked out, this tells the E.C.U how much fuel to supply to injectors, (if a deisel then check operation of glow plugs )

check you thermostat because it maybe stick on open so your engine is running cold and cant reach the required temp.

get a couple bottles of gas line antifreeze .. if you don't already use it and add it to the gas.

Robert

P.S. in minus 40 i don't even get out of bed... minus 23 here last nite... isn't winter grand

Check your fuel pressure thru out the rpm. If irratic or drops hard then its the fuel pump.

yes it can but you may have a coolant temp sensor acting up which causes the computer to open the injectors to much which can also cause this 02 sensor code. when it stalls do u have spark and fuel pressure.