I had a CEL come on, on my 97 4Runner (3.4 V-6) and took it to autozone and they gave me the printout with the code P0133. Looked like an O2 sensor, vehicle started running rough and hesitating/missing. I replaced the O2 sensor with one from Toyota and vehicle was still missing. I then replaced the plugs and vehicle still missed. I then replaced plug wire (Borg/Warner) and vehicle is still missing. Any help at all would be greatly appreciated.

 

Did you reset the computer after you replaced everything? Pull the EFI fuse for a minute or two and try it again.

 

I did reset it by pulling the EFI fuse and then disconnected the positive battery terminal. It cleared the code but then it came right back and was blinking.

 

Which O2 sensor did you replace? If I remember right there are two.

 

Did you recheck the code again to make sure it was the same code and not a different one?
Also make sure to use only NGK or Denso (OEM) replacement parts, I can't stress this enough!

Get the code checked again if you haven't already.

 

Besides the stuff already mentioed--what about cleaning the maf--checking the TPS?

 

x2 on the tps^^^^^^

 

Took 4Runner to shop, now have a $311 tab for 2 coil packs and labor. They say it's fixed. I guess we'll see. Thank you all for your input.