Scoupe L4-1468cc 1.5L SOHC (8 VALVE) (1991)
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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.
