The 1988 F-150 doesn't have a master air flow sensor.
www.motorcraft.com doesn't list an air mass sensor ( MAF ) on the F150 until the 1994 model year
check the maf sensor
Check all your grounds
Mass Airflow Sensor
Its located near your air filter box
it included in MAF sensor
The MAF sensor is just behind the air filter on your air intake
No it is not.
www.motorcraft.com does not list a MAP sensor for the 4.2 L V6 , 4.6 L or 5.4 L V8 engines for a 2003 F150 , they list an air mass sensor which I assume is the MAF sensor
with the maf sensor
Ait sensor is part of the maf sensor!
The IAT sensor is an integral part of the MAF sensor