check the Throttle Position Sensor. if it is stuck at or near thr wide open range the ecm goes into "clear flood" mode & shuts off injectors. that sticking can also cause the other problems you stated. the older non OBDII systems didnt set the check engine light like the newer ones do. I can go further in depth with this if you want.
Todd
BTW it is on the pass side of throttle body under the EGR solenoid bracket. will need a T20 bit to replace. new one may be adjustable. I will check for specs on that in the mean time
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