[CoolHandLuke]

Originally Posted by I6TT

Welcome to the n54 world

First thing i always recommend is spark plugs/coils, make sure you have healthy injectors also. For tune, i highly recommend MHD to start, depending on your mods down the road possibly custom tune. FMIC, CP and DP's will turn the car into a little monster.

Thanks!

For what it's worth I think we can cross lambda code off the list. Looks like dpfix isn't needed or recommended anymore

http://www.e90post.com/forums/showthread.php?t=834237

Leaving the expected O2 sensors and misfire likely caused by old spark plugs (I'm Ron Burgondy?)

[CoolHandLuke]

Originally Posted by Jeff@TopGearSolutions

Do you have a tune?

Did you change the spark plugs yet?

If you don't have a tune, the CEL is from the downpipes.

If you recently added a tune and didn't change the spark plugs, you are probably misfiring, causing the CEL.

Jeff,

One more thing on this. Spark plus and Injectors are on their way out and will be chanced. My mechanic noticed I'm running R-I-C-H. Any idea why that would be? I'm seeing mixed info on DP FIX, I'm seeing it's no longer necessary and it was only a short term solution. Appreciate your input and sorry for the bother

Setup is VRSF CP, FMIC 7", Catless DP and MHD only.

[CoolHandLuke]

Originally Posted by I6TT

Welcome to the n54 world

First thing i always recommend is spark plugs/coils, make sure you have healthy injectors also. For tune, i highly recommend MHD to start, depending on your mods down the road possibly custom tune. FMIC, CP and DP's will turn the car into a little monster.

I6TT, just changed plugs and coils still have the misfire although not as bad with no tune