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 MANUALSMERCURY1989GRAND MARQUIS GSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEVACUUM DIAGRAMSABBREVIATION DESCRIPTION
1989 Mercury Grand Marquis GS
Abbreviation Description
1989 Mercury Grand Marquis GSSECTION Abbreviation Description
ABBREVIATION
| Abbreviation | Component |
|---|---|
| A/CL BIMET | Air Cleaner Temperature Sensor |
| A/CL CWM | Air Cleaner Cold Weather Modulator |
| A/CL DV | Air Cleaner Duct and Vacuum Motor |
| ACT | Air Charge Temperature Sensor |
| ACV | Air Control Valve |
| AIR BPV | Air By-Pass Valve |
| ANTI B/F | Anti-Backfire Valve |
| BVT | EGR Backpressure Modulator |
| CBV | Vacuum Bowl Vent & Vacuum Thermostatic Bowl Vent Valve |
| COMP VLV | Hot Idle Compensator |
| CPRV | Canister Purge Valve |
| DV-TW | Vacuum Delay Valve |
| EGRC | EGR Control |
| EGRV | EGR Vent |
| EVR | Emission Vacuum Regulator |
| FLTR | EGR Vacuum Control Valve Filter |
| FPR | Fuel Pump Relay |
| IVV | Thermactor Idle Vacuum Valve |
| SILN | Air Silencer |
| LCV | EGR Load Control (WOT) Valve |
| MAP | Manifold Absolute Pressure Sensor |
| PURGE CV | Canister Purge Valve |
| SA-FA | Fuel Vacuum Separator |
| SOL | Distributor Modulator Valve Assembly 3-Port |
| SOL V | Distributor Modulator Valve Assembly 1-Port |
| SV-CBV | Carburetor Fuel Bowl Solenoid Vent Valve |
| TAB | Thermal Air Bleed |
| TAD | Thermactor Diverter |
| T REST | Vacuum Restrictor |
| TSP-VOTM | Throttle Solenoid Positioner W/Vacuum Operated Throttle Modulator |
| TVS | Temperature Vacuum Switch |
| TVV | Carburetor Fuel Bowl Thermal Vent Valve |
| VACVV-D | Vacuum Vent Valve |
| VCS | Vacuum Control Solenoid |
| VDV | Vacuum Delay Valve |
| VO ISC | Vacuum Orifice Idle Speed Control |
| VOTM | Vacuum Operated Throttle Modulator |
| VRDV | Vacuum Delay Valve |
| VRESSER | Vacuum Reservoir |
| VREST | Vacuum Restrictor |
| VREST FLTR | Vacuum Vent Filter Assembly |
| VRV | EGR Venturi Vacuum Amplifier |
| VVA | EGR Venturi Vacuum Amplifier |
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.