there are 2
upstream before the cat n downstream after the cat
The engine computer is the voltage regulator on a 1991 Dodge.
voltage regulator is part of the engine computer
Yes.
Right side rear of engine in top of bell housing, behind cylinder head, two wires going to it.
Under the hood on firewall in center, above engine.
On my 92 B250, the voltage regulator is integrated right into the alternator. The engine computer is the voltage regulator on a 1989 Dodge Ram Van.
A Dodge B250 Van does not have a mass airflow sensor.
open hood and take it out with some plyers or ask a more detailed question
may be in fuel tank
Depends on engine and transmission. GCWR (Vehicle+Trailer) is as low as 8800 for 3-speed V6, or as high as 13,000 for 5.9 V8 / 4speed OD
There is no hose, just an opening at the bottom of the A/C-heater box.
The oil pump is inside the oil pan on the bottom of the engine.