I recently bought a 97 S-10, 4.3 V6, 5 speed, with 70,000 miles.

It has started running slughish at lower RPMs, like between 1st and 2nd gear. It seems to "cough" now and then. Other times it doesn't want to accelerate at all.

I've replaced the fuel filter, ari filter, plugs and wires, replaced the fuel pump and computer, tried high test gass and fuel injector cleaner.

None of this had helped and the check engine light just came back on.

Please help.

 

try this
replace fuel injectors, Oxygen Sensor Replace Every 30, 000 Miles