Quote:
Originally Posted by humdizzle
just double checked with the owner.. intake, headers, and catback for sure. No tune on the car... which i think could be the cause of your CEL warning.
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Quote:
Originally Posted by justinsstang
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 know  |
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.