i am thinking about cutting my cat out and place a peace of pipe in its place till i can afford to put true duels in. looking for advice on what to do with the oxygen sencers. use new ones or the one that makes the computer think it is there

 

If the pre-cat O2 is old, and gunked up, replace it. For the post cat O2, just use the non-fouler trick, if it becomes necessary.

 

well the pre cat is firing slow so it will be replaced. how does the non fouler tirck work and how is it done. i have heard about it but not sure

 

Here ya go.