Rep Power: 0

I have a 2000 Civic Si and the engine light stays on. Yes, I have a superflow aftermarket Cat from Jackson Racing. The Cat is made for my type of car. The funny thing is that I checked the computer with my Actron OBDII Auto Scanner and the reading came up as "Cat below threshold. Now it really gets wierd. The car passed emissions. That does not make sense if the Cat is operating below theshold and there is no bad performance. The performance is great. Knock on wood!

I think it is electronic. Maybe a wire is loose or broken. But, that's just me. I want to know if someone out there can help me on this matter. I would appreciate it.


Thanks


D Rensi

 
Rep Power: 363

get an o2 simulator

 
Rep Power: 412

The header plus the cat makes it below the threshold. Just because the hi-flow cat is made for the car doesn't make it as efficient as the stock one or as the computer would want. You need an O2 simulator to get around that.

 
Rep Power: 0

yeah go get an o2 simulator

 
Rep Power: 347

o2 simulator is the way to go!!!