Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1987V 30 P/U 4WD V6-262 4.3LREPAIR AND DIAGNOSISSPECIFICATIONSELECTRICAL SPECIFICATIONSCOMPUTERS AND CONTROL SYSTEMSBAROMETRIC PRESSURE SENSOR
1987 Chevrolet V 30 P/U 4WD V6-262 4.3L
Barometric Pressure Sensor
1987 Chevrolet V 30 P/U 4WD V6-262 4.3LSECTION Barometric Pressure Sensor
MANIFOLD ABSOLUTE, VACUUM AND BAROMETRIC PRESSURE SENSORS:
Engines may use one, or a combination of these sensors. All sensors appear the same. Manifold Absolute Pressure sensors have a vacuum line connected between the unit and manifold vacuum. On Barometric Pressure sensors, the line is not used and the connector is either open or has a filter installed over it. Pressure sensors also have a vacuum line between the sensor and intake manifold and only appear on carburetted models.
Barometric Pressure Sensors: Measure voltage with ignition on and engine off.
Manifold Absolute Pressure Sensors: Measure voltage with ignition on and engine off. Start engine and apply 10 in./ 250 mm Hg to unit, voltage should be 1.2-2.3 volts less.
Pressure Sensors: Measure voltage as indicated.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.