Ford Repair: firing order and speed control sensor location, speed sensors, firing order

Question
i need the firing order for a 99 f-250 s/d 4x4 for a #4 and #5 miss fire. i also can not find the location for my speed control sensor. i think the parts store might have gave me the wrong one ?

Answer
Its the sensonr that sets on top of the rearend. A 10mm bolt holds in it place.

4X4 Super Duty
There are ABS speed sensors located on the the top of each front wheel as well as the rear end (differential). They plug in just behind the front wheel well.

can't tell you the firing order cause you are keeping the engine size secret.