Ox sensor connector removal

[karguyz]

I think I killed my ox sensor by over oiling my K & N filter. The waveform went from normal switching to a very low level as seen on the Autotap anaylzer when I reved the engine up. The injectors were just taken out and replaced for cleaning. I wasn't able to account for all the o-rings; might have dropped one into the intake.

In case I cannot bring the sensor back to life by cleaning, how do you disconnect the plug? It's hard to get to behind the engine next to the firewall. I would hate to have to take it in just to have somebody take the connector off.

Thanks,

John in Kalifornia

 

[UrbanRedneckKid]

Push the tab down on the sensor side of the connection and pull it apart.

 

[karguyz]

Thanks for the tip. I tried this on the rear after the converter connector and it worked. Then I was able to attack the front one with more confidence. Had to come in from the bottom and use a long screwdriver inserted between the loop on the car side and the tab on the sensor connector. Twisted it 90 degrees and pulled on the wires till it came out. Maybe that's why they fasten the car connector to the back of the engine, so you can yank on the sensor wires to pull it out. There isn't any room to get two hands in there to pull things apart. For that matter, there isn't any room hardly for the first hand.

After all this hassle I'll just buy a new sensor, after all it has 190 thousand miles with the original.

John in Kalifornia

 

[kkjb4x4.0]

Doubtfull that u could blow the 02 from overoiling the K+N, more likely fouled ur intake sensors. I would clean the intake first, then dump the K+N .. I have one as well, I just don't oil it anymore.Most guys tell u there's no advantage to the K+N any how

 

[scotts90ranger]

you can't clean an O2 sensor either... they're either good or bad...

 

[karguyz]

My theory is one of the o-rings went through the motor; they are some kind of rubber, maybe silicon. Couldn't account all the ones on the fuel rail after the injector cleaning and replacement. When the manifold is split it's a wide open vertical shot down to the motor so I figured a couple may have gone down the runners.

Just went and bought a new sensor anyway. In the meantime I'll put the old one back in to fill the hole and take some before and after cleaning readings of the MAF vs. throttle position and RPM, running open loop. Trying to get my money's worth for the Autotap. And I want to run the motor for awhile to clear out any contaminants still in the system. Don't want to foul out the new sensor. I don't expect the old sensor will clean up and I only want to put that connector back on once.

John in Kalifornia