Have a 1984 plymouth voyager 2.6l mukuni carb. 36,000 mi. when i start engine cold and accelerate it hesitates, it will die. when engine warms up problem gets alot better but still noticable.

SOURCE: Check engine light

they sell very unexpensive code readers at autoparts not the digital but the one with a little bliking light you might be hable to pull codes with it

SOURCE: 2001 Ram 318

Some of these have two temp sensors, one for the gauge, and one for the computer.

SOURCE: 1996 plymouth voyager 3.3 v6 code of rand/multiple misfire

try air flow meter

SOURCE: 1998 chevrolet silverado 1500 hesitates or chokes

If its been a while sense the fuel filter been chg.try that and see if it makes a difference.

SOURCE: 2001 kia optima hesitates on acceleration gets

3 possible problems your mass are flow meter/senso could be going bad but not bad enough to register a fault, the same for your idle air valve and also your throttle position sensor. all 3 of these are on your throttle body .
with the engine running tap the side of the mass air flow with the back of a screw driver, if the engine sputers mass air flow needs replaced.you can try cleaning it with some mass air flow cleaner if you cant find that at your auto parts store get some electrical parts wash. your idle air valve needs to be cleaned or replaced there hard to get off. your throttle position sensor , you need to know the setting ,if the auto parts store cant give you aprint out of instuctions best to let a kia dealership do it and pay out the ****.