Hey, i have a high flow cat on my 00 Si and i keep getting a engine code of a "faulty cat." how do i get rid of this code? I tried resetting the ECU several times. no luck. please help me!

 

i dont think resetting the ECU will do anithing..maybe an o2 simulator?..cause the sensor is reading differently now that you have a high flow cat in..doubt its street legal?

 

Sounds like you might need a o2 simulator like above, since your car is reading the new flow as though your cat has gone bad, did you use a generic or a brand cat?

 

it was on the car when i got it, im assuming its generic. I just replaced both o2 sensors.

 

Get a carsound high flow.
I have one on my EM1. No problems.

 

how much does that usually run? and where do i get it?

 

the internet is your friend. use it.

 

Has anyone tried spark plug anti fouler mechanical fix?

 

Most "high-flow" cats are illegal test pipes with no catalyst in them. I used the Carsound cat:

http://www.car-sound.com/02pro...0.asp

It is a real catalytic converter, has a correct mid-bed port for your 02 sensor, and costs $69.95:

http://store.summitracing.com/...w=sku

This worked fine on my EM1.

 

now does that cat affect anything performance wise? Its not stock right?