Scoupe L4-1468cc 1.5L SOHC (8 VALVE) (1991)
Barometric Pressure Sensor Test
3. Slowly cover about half of the air cleaner air intake, observing the change in voltage. As pressure falls (vacuum increases), you should observe a
drop in voltage. This should be sufficient to determine if the sensor is functional.
As a reference, with the use of a vacuum gauge, under sea level conditions:
Ambient pressure ...Approx. 4.00v
Vacuum 16in.Hg......Approx. 1.84v
Vacuum 24in.Hg......Approx. 0.79v
4. Replace the air flow sensor if necessary.