First what exactly is the description when ordering high amp fuses for my 05 sport trac... Tall J case 20 amp ? These are the larger ones under the hood in the power distribution box. Seems that if I use the cigarette lighter it blows #19 20 amp fuse out,(so I tossed the lighter). Anyway everything runs OK except the OBD ii . While fuse hunting the last few weeks I've noticed my fuel consumption went from 20 mpg to 10 mpg. Could this OBD II cause this?