my 91 s10 blazer with the 4.3L just isn't running right. When you first start it up and drive its fine but once it warms up i can only get to 2000 rpm or so and it bogs down and wants to stall. I changed the TPS the oxygen sensor the engine computer the coolant temp sensor the fuel filter i put k100 fuel system cleaner and deicer in it. I also took the cat off so i know thats not blocked either any suggestions???

 

*MOVING TO 1ST GEN TECH*
DIY SECTION IS FOR THREADS DETAILING HOW YOU HAVE DONE A PARTICULAR REPAIR PROJECT.

When you changed the parts that you listed, was it for specific reasons, or just trying to find the cure? Have you cleaned the EGR valve?

 

the tps and oxygen sensor were for codes i was reading the others were just stuff i thought would cause the problem and yes i cleaned the egr

 

Have you tested the fuel pressure?

 

yes i have checked the fuel pressure that is normal and i just put a new pump in 2 months ago

 

this kinda sounds like the issue i'm having, key word kinda. This saves me from replacing the engine comp.

 

Check that temperature sensor...NOT the sending unit but the sensor that sends info to the computer.

 

Oh sorry I see you already did that.