AE92

iTrader: (1)

so i have a cat back system now buit i want a catless midpipe. if i just install it as is i would get a cel correct? so how would i go about clearing the CEL and being able to run the midpipe without a CEL?

Socket7

put electrical tape over it. Or search the forums for an accessport or spark plug spacer.

Silver06

Yes you will get a CEL.
The Cobb AccessPort (using a MazdaManiac map) will mask emmissions cel's ($695).
There are "MIL Eliminators" for sale all over the Interwebs (or you can make your own from Radio Shack). What they do is use a capacitor and resistor (replacing the Rear O2 sensor) to provide a steady voltage to fool the computer. From what I've read here, they are not very successful on the RX-8. The problem seems to be that the ECU expects different voltages as the car warms up - and throws a code if the voltage is constant.

04RX8man

yes def a CEL the only way i know is like above is get the accessport

AE92

iTrader: (1)

what would the spark plug spacer do?

Silver06

A spark plug spacer is an extension that moves the rear O2 sensor out of the flow of exhaust gasses.

Note that our rear O2 sensor is a device that transmits varying voltage to the ECU based on the oxygen content of the exhaust stream. If you move the sensor the *right* distance, then it will transfer different voltages from its normal location. It's getting this distance *right* that is the challenge.

dozer

iTrader: (3)

i installed a midpipe on mine this weekend...NO cel

Big Money Pit

you just wait.

quazmosis

iTrader: (2)

I had a midpipe on for quite sometime and never got a CEL. It was the Agency Power midpipe. I took it off because it was insane loud.

Jon316G

iTrader: (1)

Give it a few drive cycles. Mine lasted a couple days without a CEL (both the AP and MazSport midpipe).
But few were lucky and never received one.

Razz1

Well there you.. isane loud and ticket or Cel.

MazdaManiac

iTrader: (3)

'04s often don't get CAT efficiency CELs.