Problem, vehicle won't pass state emissions. Used scan tool to read faults from ECM. No output or code data found. This is for a 1991 Crown Vic, 351 intercepter package that includes a feedback carb (crap). Is this a common problem (no output) with the interceptor package? Could the ECM be dead, is it fused? Can anyone help?
ps the specs are HC: 0.87 CO: 16.5 there are no NOX given. CO2: 524.8
Thanks