Has anyone put on MILS and still got a chk engine light. I did a diagnostic and it showed no codes. Yet the chk engine still stayed on. I unplugged my battery and reset the computer and the light went off for 40 miles. Now it's back on again w/ a p1000(which is a test for OBDII). Anyone have a idea. This all happned after I put headers and a midpipe on. Any help would be appreciated.