My 1999 s10 truck 4.3 is not running right will not take the gas changed the plugs,wires,rotor button,cap and spider injectors and still not taking gas

SOURCE: Running rich and lean

the codes ur getting will be thrown by a vacume leak make sure u dont have a vacume line leaking or split also check ur pcv valve for clogging

SOURCE: s10 pickup after warming up truck starts missing

You might have computer problems.

Does the check engine light come on when it starts to miss?

SOURCE: 1996 s10 blazer misfire cylinder1

i delt with this once changed the computer and that was it hope this helps

SOURCE: #6 cylinder misfire

could be a vacuum leak around the intake manifold. with enginerunning spray car cleaner around intake if rpm changes then there is a leak

SOURCE: i have 94 s10 blazer 4.3 the prob started the

throttle position sensor, or check to make sure you have vacume going to the map sensor. Alot of times the outlet on the throttle body gets plugged and there is no vacume at the map--causes it to die. unplug the throttle position sensor and then rev it up and see if its better.