Tomei EL Headers and Perrin 3in exhaust and CEL

[Evil Rocky]

So I just had these installed 2 weeks ago and a CEL popped up. Any idea where I should start to fix it? I am going to check the code later today at Autozone.


But any help on what people have done to fix this similar problem would be greatly appreciated.

[Freeman]

Catless header most likely causing the code. Get it tuned and the tuner can fix it

[Evil Rocky]

It is catted

[fika84]

Still probably going to have to get it tuned to get rid of it. Who installed it? Have you asked them?

[Freeman]

Do you have a picture of the catted Tomei EL header? Wasn't aware tomei offered that and I can't find a picture of that anywhere. If it is catted and its of OEM density and not a high flow cat, then without the code there's no real way to trouble shoot

[kch]

Originally Posted by Evil Rocky

So I just had these installed 2 weeks ago and a CEL popped up. Any idea where I should start to fix it? I am going to check the code later today at Autozone.


But any help on what people have done to fix this similar problem would be greatly appreciated.

As others have said, it's likely the header. Even catted aftermarket headers can throw a CEL. Only way to fix it is with a proper tune.

[Evil Rocky]

I had a shop do the install. Do I need anything for a tune? Like a separate chip or computer for it?


When I ordered everything I asked for it to be catted and the receipts said catted.

[fika84]

Originally Posted by Evil Rocky

I had a shop do the install. Do I need anything for a tune? Like a separate chip or computer for it?


When I ordered everything I asked for it to be catted and the receipts said catted.

You can either find a tuner near you and ask what they prefer. Or you can get an off the shelf tune and something like the Open Flash Tablet and flash it yourself. Will get you some extra power too.

[Vten]

Ask your tuner to turn the 2nd O2 sensor off. That how I did mine .

[Bach415]

Originally Posted by Freeman

Do you have a picture of the catted Tomei EL header? Wasn't aware tomei offered that and I can't find a picture of that anywhere. If it is catted and its of OEM density and not a high flow cat, then without the code there's no real way to trouble shoot

^This. I don't think Tomei ever offered a catted header for this platform ever.

[jawn]

Which vendor sells catted Tomei headers?

[kch]

Originally Posted by Evil Rocky

I had a shop do the install. Do I need anything for a tune? Like a separate chip or computer for it?


When I ordered everything I asked for it to be catted and the receipts said catted.

Do you have a pic of the header? Or I suppose a better question would be, is your cold start ridiculously, earth-shakingly, window-shatteringly loud? If it is, then you have a catless header, regardless of what the invoice says. I don't remember tomei ever offering an EL catted header for this platform.

The two most popular options for tuning are the OpenFlash Tablet and ECUtek.

The OFT is a small touchscreen device that plugs into your OBD2 port. It can monitor various engine parameters as well as flash tunes. The tune files for OFT are generally what they call "off-the-shelf," which means they're tunes that haven't been customized for your specific car and are designed to be safe across the vast majority of cars. Tablets are roughly $500 new, but you can find them used fairly easily.

ECUtek is a more advanced tuning option, but is also more expensive. To get started with ECUtek, you'll need a cable, a license, a tune file, and a laptop. ECUtek licenses aren't transferable; they stay with the car forever. There are some off-the-shelf tunes for ECUtek (like the Delicious Flash-n-Go series), but generally if you go ECUtek you should get it custom tuned. You can contact places like Delicious or Moto-East for remote tuning, or see if there's a reputable tuner near you.

[Dr. BRZ]

as we can agree, dude you got juked because we are pretty sure tomei has never made a catted header for our platform. we can be wrong but pretty sure they have not.
they just wanted your $$$

[jawn]

Originally Posted by kch

Do you have a pic of the header? Or I suppose a better question would be, is your cold start ridiculously, earth-shakingly, window-shatteringly loud? If it is, then you have a catless header, regardless of what the invoice says. I don't remember tomei ever offering an EL catted header for this platform.

The two most popular options for tuning are the OpenFlash Tablet and ECUtek.

The OFT is a small touchscreen device that plugs into your OBD2 port. It can monitor various engine parameters as well as flash tunes. The tune files for OFT are generally what they call "off-the-shelf," which means they're tunes that haven't been customized for your specific car and are designed to be safe across the vast majority of cars. Tablets are roughly $500 new, but you can find them used fairly easily.

ECUtek is a more advanced tuning option, but is also more expensive. To get started with ECUtek, you'll need a cable, a license, a tune file, and a laptop. ECUtek licenses aren't transferable; they stay with the car forever. There are some off-the-shelf tunes for ECUtek (like the Delicious Flash-n-Go series), but generally if you go ECUtek you should get it custom tuned. You can contact places like Delicious or Moto-East for remote tuning, or see if there's a reputable tuner near you.

The only problem with this, unless if I've missed something, is that both (some) ECUTEK and OFT force a "NOT READY" for the 2nd O2 sensor on catless tunes.

Illinois doesn't allow any incompletes or not-ready codes during emissions testing.