Hi guys,
My GS300 is almost running perfectly. I have replaced plugs, wires, coolant temp sensor, TPS etc. However my car runs exactly the same with the O2 sensors unplugged. Has anyone experienced this before?

thanks

 

Yes, mine ran the same with a faulty O2 sensor, but it throws the CEL.

 

thanks man. I am burning a boat load of gas. I put $30 in gas tonight and after driving about 120 miles I have less then a quarter tank left....

 

have you changed out the fuel filter? or gas cap can be faulty and slowly leaking vapors? also how is your cap and rotor?

 

In most cases, unplugging the o2 sensor will not make you notice any changes (other than poor gas mileage).