Well last night me and my dad installed an O/R X pipe and removed the air pump. Didn't drive it till today and loved the sound. Now the problem, after 10-15 minutes the CEL comes on. If I shut the car off and restart it stays off for the 10-15 mins again. I noticed one of the O2 sensors had a bit of a stretch to get to the plug. If it came undone or broke a wire would it take this long to throw the light? Another thing I was thinking was that we sprayed a ****load off PB Blaster on the studs comin from the collectors and you can still semll it burning. Could the chemicals in that cause the readings to be off enough to cause the light?