Mystery problem!
 

HI all
I'm Brand New here and I have a mystery on my hands
I have a 1993 Toyota 2 wheel drive extra cab pickup 5 speed with the 22re motor. Great little truck!
Motor has about 170k on it Body 270K
Lately, and seemingly mostly when warmed up , it has started to stutter and miss almost like it's running out of gas when accelerating. The truck jerks and bucks some when it does this. the engine check line comes on and off.

I've looked at a few things so far:
-The one time I did a diagnostic check the engine check light flashed a engine coolant sensor code (22 I believe) and I pulled it and checked it but as I can't find the exact resistance it's supposed to measure hot and cold I'm not sure if it's good(it measured around 1.9-2k hot and maybe around 6 or 700 ohms cold)
I couldn't get the diagnostic to show that warning again after I reinstalled it????!
-mass airflow unit tests okay (I did both tests (2nd test involves moving the
paddle')
-tested the injectors with an ohm meter and listened to them. they seem okay.
- replaced the fuel filter
- New plugs, wires set, distributer cap, and rotor
- new air filter
- ran injector cleaner through the fuel

What I haven't done:

-I haven't set the TPS as i can't get the bottom &^%*&^% screw off
- I think I tested the O2 sensor at the diagnostic plug but I could be completely off my whack about that and likely it is untested.
- I haven't tested the fuel pressure as i haven't made the appropriate adapter yet
-I haven't checked the conveniently located fuel pump...haha

I suspect one of the sensors

Any ideas or insights???

Had something similar happen on my wife's mini van a few years back. It only started doing it when it got up to temp.

It turned out to be a bad thermostat. I pulled it on a hunch and the spring was broken and the thermostat stayed open all the time.

I swapped in a new one and problem solved. Just spit balling but it would be worth a check.

Sounds like the TPS to me.