If you read the Magnus link, you'll see that the ECU bypasses the Misfire Check if several sensor parameters aren't met. The easiest one to manipulate, without causing other MILs or issues, is the BARO. You can run the voltage just far enough out of spec for the Misfire Check to be bypassed without causing an MIL for the BARO using the pot. However, this also leans the AFR out slightly, which can cause issues. So, I simply change the code to ALWAYS bypass the Misfire Check. /ubbthreads/images/graemlins/wink.gif