i'm not throwin a CEL but the OBD II stats that my IMRC box is stuck closed. 90% of the time i drive, no matter how long, it runs great. about a month ago, it was dogging down after 15 mins all the time. not sure why its runnin better now. i just purchased a used IMRC box and i'm going to swap them tomarrow and see if i notice a difference. if i dont ill put my old one back on because this is not the problem. if somoene wants the used and workin IMRC box i have, let me know. ill post results tomarrow.