After looking at the '746 schematics again the fuel pump relay is not connected to the vats system so either he is not actually burning a chip or there is another issue. Since he has a bin with the bcc ANTT then he has to have an '89 model F-body which is what I have so I might be able to help if there is another issue. My other '89 Formula actually had the same ANTT calibration in it originally. First we still gotta see if he is burning a new chip though.