Hello All- I have a 95 6.0 liter convertible that has failed six emissions tests. All of the parameters are significantly over the legal limits (noX, hydrocarbons, etc.) I get a diagostic code FF67 on trip computer. The dealer has checked the air injection pump, replaced both cat converters, and a number of other checks. The registration is almost up on the car, and without passing emissions i cant do anything with it. any suggestions would be much appreciated. Thanks.