just wondering if anyone know how to tell if i have a speed density or mass air flow, thanks

 

Look at the intake.
If there are two hoses coming off the throttle body which run directly to the air box, it's S/D
If the two hoses merge into one and that one runs to an aluminum cylinder mounted next to the air box, it's MAF. The aluminum cylinder is the MAF meter; S/D systems don't use them.

 

S/D



I'm sorry for not having a good shot of the MAF from my grandfathers 94 bronco. The 96 Bronco's and F150's are MAF, and I imagine the 250s are too.

Adrianspeeder

 

I'm not sure about the OBD-II rules in 96 for F250s. If they didn't need OBD-II, they probably stayed with S/D. I think the break for OBD-II was at 8500# GVWR in 96 and went to everything in 97.