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.
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HOMESERVICE MANUALSCHEVROLET1987V 20 P/U 4WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSMANIFOLD PRESSURE/VACUUM SENSORSERVICE AND REPAIR
1987 Chevrolet V 20 P/U 4WD V8-350 5.7L
Manifold Pressure/Vacuum Sensor: Service and Repair
1987 Chevrolet V 20 P/U 4WD V8-350 5.7LSECTION Service and Repair
Fig. 337 MAP Sensor Removal (V6 Models Similar):
The MAP sensor unit is not serviceable and must be replaced as a unit.
1. Disconnect vacuum hose from MAP sensor, then remove top of air cleaner assembly.
2. Remove MAP sensor unit retaining clip, then the sensor, Fig. 337.
3. Reverse procedure to install.
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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.