OK I put my stock air box back on the other day cause i had the F5 cai and it was making my CEL go on. I do have headers and the anti-fouler plugs in my s pipe. Is there anything else that would cause the CEL to go on again with this setup.

 

1. Reset your ECU
2. Don't post this in the FI section

 

Throw another anti-fouler in. Get your codes run at auto zone and report back.