K&N causing a CEL

[bobdogwv]

I purchased a brand new K&N filter for my 97. I was told that it was ready to go out of the box (pre-oiled from K&N). I installed it and after only about 30 miles of driving it threw a CEL. The codes were pointing to O2 sensors and such and also a MAF sensor. I took out the MAF cleaned it and reset the CEL, drove again a few miles and back on comes the CEL. I took out the MAF again, cleaned it and replaced the K&N with my original paper filter and guess what, no more CEL's. Should I clean my K&N and properly oil it to see if it was just over-oiled out of the box, or just replace my filter with a new paper one?