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 MANUALSBUICK1987ELECTRA V6-231 3.8L VIN 3 FIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORDISTRIBUTOR VACUUM CONTROLDESCRIPTION AND OPERATIONELECTRONIC MODULE RETARD-VACUUM SWITCH (EMR-VS)
1987 Buick Electra V6-231 3.8L VIN 3 FI
Electronic Module Retard-Vacuum Switch (EMR-VS)
1987 Buick Electra V6-231 3.8L VIN 3 FISECTION Electronic Module Retard-Vacuum Switch (EMR-VS)
The electrical contacts of this switch are normally closed. When the TVS directs vacuum to the EMR-VS, the contacts close and complete the circuit to ground. The circuit is energized when 4 or more inches Hg are applied and de-energized when vacuum is reduced to 5.75 inches Hg or less.
RENDER: 1.0x
NO RELATED
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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.