It completely lost its tune about 6 months ago and has been running rich as hell every since . I mean it hits 10.0 on the wide band at wide open throttle. I am just glad to have it running right again . I just dont understand how a car can just lose a tune with out doing anything to it . All the compression numbers are the same if not a little higher . It stills pulls 23 pounds of vacuum so the motor is in great shape . The lowest i ever see the oil pressure is 21 pounds and now its running great but for no reason at all it just lost its tune that just dont make sence to me.