Installed OFH but...
 

I just got a P0171, P2097 and a P219A code. And I have searched it up. It says I'm running to lean, but I can smell gas. Like I've been driving a gokart. ps: running catless headers and catless FP w/ stg2 uel oct91. So I think that's the gas smell.
I tried clearing the code with the OFT, but it came back after a while.
I wouldn't know how to check for leaks, or check if my MAF is dirty, check my o2 sensors or how to fix such things.
Any help would be greatly appreciated.

Are you already running the UEL tune?

P0171 is too lean on bank 1
P2097 is too rich on bank 1
P219A is a/f ratio imbalance on bank 1

These cars only have one bank for O2 sensors, so you can ignore the bank 1 part. If this wasn't happening before the header, it's pretty safe to rule out the MAF.

Are you getting all three codes back, or just the lean code?

Did you install the header, or have a shop do it? If it was done at a shop, I'd go back and ask them to check for leaks and to make sure both O2 sensors are plugged in and in the right locations.

Thanks for the response. I'm on UEL stg2 91oct OFT v2.068. And it only started after I took my car to nextmod to install it for me. I'm also now getting P0137. It's saying rear O2 sensor low voltage. Is it safe to drive the car and just erase the code for a bit? As well as is it normal to smell gas on full out catless exhaust?

Well the car probably is in limp mode, so it's safe to drive it to the next place provided you don't rev it high

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The reason you smell gas is because you're catless.

The car is now in the garage and just sitting there.

I'm getting the codes back so it's either it has a leak, or O2 sensors are bad?
Would reusing the old OEM gaskets be the cause of this when I installed the OFH?

Could be. You should use new gaskets. Are the 02 sensors plugged in correctly (black to black/grey to grey. In the right bungs)?

I may have to take off work tomorrow just to get this issue fixed. I also have to buy new gaskets at the dealership tomorrow. I will check if my o2 sensors are plugged in the right place. From what I saw earlier, the black is on black, and grey is on grey. I'm not sure about the bungs. I can't see them.

It really sounds like something wasn't installed right. The rear O2 code might be because it's catless, but I thought the UEL tune came with the cat efficiency code(s) disabled by default?

Sounds like nextmod screwed the pooch

I'm not getting any of the cat efficiency code(s). Steve99 was saying it may be a leak at the o2 sensor since one of the bung didn't snug in at first. They forced the o2 sensors in one of the bungs. So now that leads me to think that where the problem lies. Leak where the o2 sensor is. Question is, I don't know which o2 sensor.
How would I know if that is where the actual leak is?
And how would I be able to fix this?

Voltage too low wouldn't be from a leak, that sounds like either they plugged the O2's into the wrong plugs (swapped), or something was damaged.

Thanks, I'll check out the plugs right now. But I really doubt it was swapped by accident. I believe it's a leak at the o2 sensors. Or maybe it's damage. Does that mean I have to buy new sensors?

Yup, if they were damaged or cross threaded I think the only option is to replace them.