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Thread: Running rich with catless headers

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  1. #1

    Running rich with catless headers

    So I have the RRE Headers, (Catless) and I have the O2 spacers in the correct location, but I keep popping running rich bank 1 and bank 2?
    Will O2 sims fix this or is this a tuning issue?

    It seems to go away when the air temp is really cold.

    Im going to try changing the short ram's filter to a better one, and I installed a shroud to block some of the directional heat with a hose for cold air.
    I also have some o2 sims on order and ill install them anyway just because every so often I pop low voltage codes for the post o2 sensors.

    Current Codes:
    P0172 (Bank 1 - System Too Rich)
    P0137 (Bank 1 Sensor 2 - 02 Sensor Circuit Low Voltage)
    P0175 (Bank 2- System Too Rich)
    P0157 (Bank 2 Sensor 2 - 02 Sensor Circuit Low Voltage)
    Last edited by 12GaugeMule; 10-16-2015 at 11:50 AM

  2. #2
    So this weekend I will be trying some sims, to see if that fixes my codes and issues.
    I bought some sims from Magnum Tuning.

    Below are pictures of the sims and the project box I have them encased in, as I will be "covertly" wiring these into the system, lol.











    NOTE: I tried anti-foulers and the 90' angle ones that came with the RRE Headers and they did not solve the issue.

  3. #3
    Ok all wired up, previous codes gone but now I am getting the following?

    P2252 O2 Sensor Negative Current Control Circuit Low

    Anyone know how to fix this one?

  4. #4
    that's weird. i got the same header and haven't had any issues since the install...
    2005 LANCER EVOLUTION MR
    2012 GALANT SE

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