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 MANUALSBUICK1987CENTURY ESTATE WAGON, 2.5 RREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMMODEL IDENTIFICATIONMODEL IDENTIFICATIONFUEL SYSTEM & VIN IDENTIFICATION
1987 Buick Century Estate Wagon, 2.5 R
Fuel System & VIN Identification
1987 Buick Century Estate Wagon, 2.5 RSECTION Fuel System & VIN Identification
The following table lists the systems used with each engine.
SYSTEM IDENTIFICATION
| Fuel System Type | Engine & VIN |
|---|---|
| Minimum Function | 1.6L (VIN C) |
| Full Function | 2.8L (VIN X), 3.0L (VIN E), 3.8L (VIN A), 5.0L (VIN G), 5.0L (VIN H), 5.0L (VIN Y), 5.0L (VIN 9), 5.7L (VIN 6) |
| Throttle Body Injection | 1.8L (VIN O), 2.0L (VIN P), 2.0L (VIN 1), 2.5L (VIN R), 2.5L (VIN U), 2.5L (VIN 2), 4.3L (VIN Z) |
| Port Injection | 2.0L (VIN M), 2.8L (VIN S), 2.8L (VIN W), 2.8L (VIN 9), 3.0L (VIN L), 3.8L (VIN 3), 3.8L (VIN 9), 5.0L (VIN F), 5.7L (VIN 8) |
RENDER: 1.0x
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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.