because of the ECU and probably due to other reasons, and perhaps even your rings did not fail due to running rich....and I highly doubt JWT runs any leaner than a tune from Ash. Your response leave a lot of questions to be answered, if what you are claiming has any validity, this is a HUGE issue. Please do us all a favor and post a new thread with all needed info, pics, etc. Again this is a HUGE deal if what you claim is true.