Posted a few weeks ago that I was still getting the SES light after installing the non-fouler fix. I got a OBD2 scanner so I could figure out what the problem was after resetting it for the umteenth time.

Pulled codes P1273 and P1283. Looked on the boards here and people said it's related to the HFC's and that it can also be caused by running too rich.

Then it clicked, last time I got my car dynoed dude did tell me I was running rich all the way through.

What should a NA cars A/F ratio be anyway? I think last time I dynoed at 4500k it dipped to ~11.5 and then hovered around 12 to redline.

Guess this is my cars way of telling me to get engine management and get tuned.

 

You're leaving out some critical pieces of information.

If you list everything about your car it's easier to help you out.

year, mods, etc.

AFR should be between 14.7 at cruise and light acceleration, to 12 (high load, wide open throttle near redline)

11.5 is a bit low.

 

Plenum spacer, Y-Pipe, HFC's, AAM ecu flash, hks dfi 2, pop charger intake.

2004.5 Performance model.

Thanks for the help!

Oh, and here's the dyno.

 

That looks like a safe a/f all the way to redline. You are running a bit rich, but its fine and safe. I would check to see if your MAF sensor is dirty, if it is then clean it properly.

I would also check your o2 sensors, if everything is fine it shouldn't throw any CEL's.

 

My guess is it's due to the AAM reflash. they most likely added more fuel so timing could be advanced safely (not sure about this?)

It looks like you have nothing to worry about, but a CUSTOM tune might free up some more HP...

Are you sure p1273 is a RICH condition? I saw a post saying it was LEAN condition (but it doesn't look like you're running lean at WOT, which is good)


Which HFC's do you have, and did you install them before or after the AAM flash?

 

I have the AAM cats. They were installed after the flash.