ARC HFC, after install - throwing codes, Options?

OldFart

Intalled a CNT racing catback exhaust, that install no issues. A few weeks later installed a set of ARK HFC's (used new Z1 gaskets) with the resonators (assuming they are all like that). After installed, code came on, had cleared and bought some extensions. Installed extensions, can drive about 30 miles and the SES light pops on again.

Also running R2C air intake, but after that install, no codes were thrown.

The codes I am getting are a P0300 and P2A03, don't mind the light being on, but if I let it go on for a period of time, effects the idle of the car, once cleared again everthing returns back to normal. Was reading some stuff on the net about exhaust leaks, etc...

If I have time, going to put car on lift to see if I have any obvious exhaust leaks at the converters.

Besides a tune, does anyone have any suggestions? And if a tune is in need, anyone know of anyone in the central PA area?

roy'sz

I had the same problem with my ark hfc's. Random multiple cylinder misfire, that is why it idles rough. P2a03 I think is the lean code and p0300 is random mulitiple cylinder misfire. That's why it could be a leaning issue since that was what my dealer had told me. It was getting pretty bad though the longer I drove it without the tune, But it really runs awesome now that everything is cleaned up.

SES after G3

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https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-

Leuz

Have you tuned the car after enhancing all those breathing mods? You should REALLY consider a tune.

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2013 PW 370Z Touring+Sport, NAV
Tint 35% side, 18% back | RJM clutch pedal | ZSpeed SS lines | Stillen Gen3 CAI | Fast Intentions HFC and TDX 12'' CF CBE | UpRev

OldFart

Found a place 10 minutes away that "should" do tunes and is a UpRev dealer(?). Already sent them an e-mail since it's the weekend and hope to hear back tomorrow about scheduling an appointment.

370Z JT

If you handled the MAF sensors, you're gonna want to clean them (P0300). P2A03 should be accompanied P2A00 and are related to the o2 sensors in your HFC. Common fixes are adding or removing excess steel wool in the bung. Goodluck.

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