cant get the pre o2 off any tips . my o2 is in my passenger side header . its easy to get to but its in there good any ideas ? if i cant get it out will i have to drill a new hole ? what size wrench is reccommended ?


also i bought a IAC what do i need to take that off and can i take it off with out removing my throttle body really dont have time to work on the truck .

hope to fix my idle issues

 

From what I can see on my 97, the IAC is on the back of the TB if I'm not mistaken. And it's two phillips screws, I would just hit them with a little PB blaster or something of the sort since its steel screws in an aluminum TB, and use a stubby screwdriver.

As for the o2, that I can't be of help with since I haven't dealt with those before, sorry about that one.

But good luck with the IAC, should only take a few minutes if all goes well.

 

I got an o2 socket from harbor freight and used a long breaker bar to remove mine.

 

A big *** wrench! Put your feet on your front passenger tire and pull with your whole body. That's how I broke mine loose. T'was not easy.

 

Try talking dirty while gently rubbing it.

 

The TB sensors are held on with a #25 torx head, not a phillips head. Don't tear up those screws fumbling around with a phillips.

I believe the correct wrench for the O2 sensor is 7/8", get a long one and put your *** into it. Might try heating the sensor bung on the exhaust pipe with a torch before you wrench on it. Some lube such as pb blaster or others may help as well, just don't spray anything flammable on a very hot piece.

Spraying a semi hot sensor bung may actually help wick some of the lube into the threads, you just don't want it burn up and turn to carbon.

Be sure to apply high temp copper antiseize to the new sensor threads to avoid this same problem in the future.

 

a 7/8" o2 socket is worth it's weight in gold.. will cost you about $10.. it will make short work of your issue..

 

That always works for me!!

 

Start the truck and let the exhaust get hot,then try and remove it. Be careful,don't get burned.

 

Do not use Bosch or any really cheap O2 sensors if you can help it. Rock Auto has good prices for some nicer sensors, like Denso or NGK/NTK.