prevent from throwing downstream 02 sensor

[99 E-klips gs]

I am going to hollow out my catalytic converter. But that's not the point. After doing this, isn't my downstream 02 sensor going to flag my CEL and mess up my fuel?

 

[cl1ckclack]

yup.. sure will throw a code.. shouldn't mess anything up though. i don't even have a post cat, o2 sensor.

 

[mchustle]

Actually I have a 3in catdelete downpipe and I screwed the o2 sensor in and never got a cel. But either way it doesn't mess with fuel only the front o2 does that.


Edit- didn't realize you were 420a so I'm not sure on the previous comment. Although on my old n/a I didn't have either o2 and I didn't really have a problem with it other than a little rich and cel.