95 s10 power loss

I have a 95 s10 with the 4.3 tbi that will act like it is not getting enough fuel going down the road some times and other it runs great. I have changed the tps,tbi,oxgen sensor, fuel pump,fuel filter, map sensor and nothing make it any better. what could it be?

I have a 95 s10 with the 4.3 tbi that will act like it is not getting enough fuel going down the road some times and other it runs great. I have changed the tps,tbi,oxgen sensor, fuel pump,fuel filter, map sensor and nothing make it any better. what could it be?

Could be many things.
First thing.
Check for lose of fuel pressure when it is acting up.

I have checked the fuel pressure and it looks fine. I have been working on it and the thing that make the most diffrance is to unhook the oxgen sensor and it runs alot better but still no correct.

I have checked the fuel pressure and it looks fine. I have been working on it and the thing that make the most diffrance is to unhook the oxgen sensor and it runs alot better but still no correct.

remove the upsteam O2 sensor from the exhaust ////LEAVE THE MOUNTING HOLE OPEN ....then see if your power returns ...if so you have a restricted exhaust/// or cat converter .....