the Oxygen sensor is located the bottom head near the malfiold
it has 4 wires on itt
black ground
white feedback
red votlage
white output singal
this is a Zirconia switching sensors. and i back probe the 02 sensor wit the pin and check the singal from the oscillpspe and it was connecting "ok"
so i rev the engine to 2500 RPM and i feeze it ..
the voltages goes to .8v and the lowes is 0.2v so the aeravge is 0.45. it has 12 cross counts go from high to low. if there wernt any singal that mean the 02 sensor is not working at all.
The next bit the engine was warming up then rev it up to 2500 rpm for half a min like 30second then take a pic of it and freeze itt
Making the 0xygen sensor go rich
the voltages of 02 sensor went up to 14.39vs if the singal doesnt go high that mean it has a poor gas or it could be loose 02 sensor or maybe bad connectors.
This a pic of the waveform
that a pic of the zironium sensors. the zizoniums is for for measuring oxygen
this a good pic of showing how it works
that pic it showing the all the gas from oulet to the manifield to the 02 sensor then down to the exhuast and it showing the postive , negtive and then singals as well.
The last thing all the work i have done. well it hard to find out if the the engine running rich or lean so i would have used the scan tools and find out. so my view i dont think so there any 02 sensor faulty they are fine. well sorry i couldnt find the spefeication for the Ford car because i dont even know the model of it so im sure other student didnt get the spefication for the red Ford car..
