I have a 95 GMC Sonoma 4.3ext cab and it seems to have trash or a miss in it

Well today I cleaned the injectors and it doesn't have a catalytic converter on it. So I also bought a air control valve on the side of the TBI.so I've checked for vacuum leaks and haven't found any . Do u think it could be a throttle position sensor or the coil breaking down once it gets hot but it seems if it was any of these problems it would do it regardless of temperature or not. Is there anything else in the distributor that would be the problem any help would be appreciated.. I've almost got a brand new 95 Sonoma so far lol and my pockets are almost empty hahaha...