1990chevy4541ton

Okay So Heres the Deal , im Gonna Start From Beginning of Problems til now.

A month ago i started having problems when i started the truck it would fire up then shut down , fire right back up drive away , no problems.

this last week i drove to the river bottom with my buddies , ran it pretty hard and its about 150 miles round trip , when you hit the throttle it will fall flat on its face then pick back up and proceed to buck and snort. no backfires pinging or popping though , i though **** it , ill do the fuel filter and pump first , i di those had the same problem still.

today i rebuilt the fuel pressure regulator inside of the tbi and cleaned the idle control sensor inside the throttle body as well.

it seemed to help it quite a bit , until i drove it for a while again then the same problems are happening , so as of right now i start it , it satys running and willl drive in gear til you decelerate then it will stall it will buck and snort at times as well. please help my guys im really stumped

It is Also throwing Three Codes , 13 oxygen sensor , 34 spark control module , and 43 map sensor

heres a list of recent new parts. in the past 3 months

both head gaskets
intake manifold gaskets
egr valve and hoses
throttle body gaskets
exhaust manifold gaskets
power steering pump
serpentine belt
electronic control module
cap plugs and wires
air filter
fuel pump and screen
fuel filter
rebuilt fuel pressure regulator
cleaned idl speed control sensor thouroughly