Is there a way to access mode 6 so I can determine which cylinder is misfiring. I tried the cylinder contribution test, but all were at 0 while vehicle was noticeably misfiring off idle.
You should be able to use the Generic EOBD2 Emissions software and select the option for Mode $06 will show Mis-fire counter per each cylinder or groups of cylinders. If you cannot view EOBD2 let us know which unit you have and verify the serial number.
