Originally Posted by noopie

BUMP

I tried this on my testpipe w/ 2x antifoulers, and it worked for ~200miles. Today the CEL just came on and has been coming on for the last 5 restarts.

I followed the link to the s2k forum, and they have some ideas to maybe fix this if the CEL returns,

"1. 70mm invidia tp w/ built-in fix on stock exhuast (ap2 '07)
2. added external spark plug defouler fix (ebay one piece deal)
3. packed steel wool into the external fix
4. added header wrap to the tp - to stablize temp around the 02 sensor "

I'm planning on adding some steel wool when i have time this week.

Does anyone have any other suggestions?

How would i know if the code is caused by too LOW or HIGH exhaust flow to the sensor?