Any catalytic converters on the car? Of course I could crawl under the car and look, but I dun wanna =( lol

Haven't had any time to really inspect it all yet. Working too much lmao. Finally get a day off this week on Thursday.

I have a $500 shifter and a quad tip GT500 exhaust conversion sitting at the house waiting to go on my mustang that both got delivered last week. I'd like to get to that this week but Wednesday I have 8 hours of overtime and Thursday I'm having to take the FR-S to the dealer to have them check out why the power outlets aren't working/why the check engine light popped up and read lean. Now I assume it is either a fouled o2 sensor that "un-fouled" when I ran a can of seafoam in the gas (the CEL has went off now) or it's going to be a persistent thing that appears occasionally because of no tune on an un-catted car (if it doesn't have cats). That or maybe the sensor is moved up or down stream from it's orginal placement because of the headers and doesn't like the new position. Who knows :iono:

So true lol. The S197 mustang actually is actually pretty decent with handling. Most people just assume that because it's a muscle car it can't turn. All it takes is a little suspension work and it can hang pretty well (mine already has a full BMR suspension lol:happyanim:).

OP, The CEL is probably because of the aftermarket header. Pretty much every aftermarket header, with a cat or not, will eventually throw a code (P0420) for cat efficiency, unless you get a tune. It is to my understanding that driving around with this doesn't harm your car, but I would imagine it to be pretty annoying. It could be caused by the intake as well, but I would bet that it's because of the header.

With that being said, welcome to the forum! I LOVE that color on your Mustang.

-J.B.

If you run Torque OBD2 it does allow you to reset/clear the CEL if you're sure it's safe

are you positive that your front tires aren't mounted in the wrong direction

What makes you ask that lol