Dear all,

I installed decat pipe for my evo x and spacer for the O2 sensor and the engine light still keep coming on after 2 or 3 days. I have changed the O2 sensor twice and it is the same. Any reason and suggestion? Thanks!

Victor

 

What pipe did you install? What kind of spacer did you use? Are you running any type of tune? No need to keep buying sensors. That's not the problem.

 

Spacer angle
Decat extreme Ti
Spacer
Thanks for the reply! The above pics are my current installation. I have not done any modification to the stock engine and the stock computer.

The engine check code that came up was P0420

Will the L shaped spacer solve this problem? If so, where can i get the L shaped spacer?

Thanks guys!

Victor

 

You can search "O2 spacer" if you want. Basically sometimes the spacer works.... sometimes it doesn't. Depends on the car. I know... weird. I had the same issue with mine. Only way to "fix" it would be a tune. Either way you're going to need one since you installed a test pipe.

 

I use one with a 90 elbow and it works fine.

 

i had the same issue went away after a while

 

why would your first mod be cat delete.. Now you need a tune anyway so go get it done and theyll turn the light off

 

Depends a lot on everything. Literally. I had the stock manifold/stock turbo, AMS downpipe and catless test pipe last year with a custom made L shaped spacer and the CEL used to play peek-a-boo with me. It would come & go for that code.


This year the car has a tubular manifold, different turbo, and a different tubular downpipe with the same catless test pipe and L shaped spacer. Never once got a code in 4000 miles as of yet, I even passed the OBD plug in emissions test this way with every single readiness emissions monitor set and happy.


I would try a J/L shaped spacer and go from there. It might work, it might not work but it's worth a shot. Mine is quite long since I custom made it.