4
No
Look under the vehicle and count them.
Yes
Mass airflow sensor and or aircharge sensor is bad
4 2 left side and 2 right side
Ford F150 can have either one or two converters. Depends on the year and model, I have a 92 F150 Flareside 5.0 and it has 2 catalytic converters. My 03 F150 supercrew has two. One at the back of each exhaust manifold. The one from the drivers side enters a crossover pipe that T's with the passenger side at the back of the transmission on the passenger side.
There are not two catalytic converters. Working towards the muffler from the flange, you have a RESONATOR, a CATALYTIC CONVERTER and finally a MUFFLER.
I would think no way, but also no way would you pass an emissions inspection w/o catalytic converters. Here in Maryland it is a bi-annual inspection.
They have 4...there is two on each side right before the Y pipe!
At the rear of the engine and the second one is in the middle infront of the muffler
Check to see that your catalytic converter is not full. Otherwise get your engine tuned up.
drivers side of engine , downstream from catalytic converter