Where is the Air Mass Meter? and where is the Fuel Pressure Regulator? If I wanted to check these parts myself or replace them myself ....where would I find them under my hood. and what exactly do they look like.?

my 1990 740 GL starts ok, then when i'm driving i'll come to a stoplight or stop sign and when I go to take off again, my car will cut out, and putt along when I press the gas pedal. My rpm's will drop when I press the gas pedal down, but if I let off the rpms go back up , but when I try to accelera...