I just installed a Pioneer Nav System in my 2004 F150 Lariat and need to find the "vehicle injection computer". Can someone help me? Where is it and what does it look like?

 

Why do you need to find the "Vehicle injection computer"???? I have installed a few radios and nav systems and never had to attach it to the engine control module. FYI if you don't know where your computer is you might want to get a manual for your truck or take it to somone who knows your truck.