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 MANUALSBUICK1991CENTURY L4-151 2.5L VIN R TBIREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULESERVICE AND REPAIR
1991 Buick Century L4-151 2.5L VIN R TBI
Ignition Control Module: Service and Repair
1991 Buick Century L4-151 2.5L VIN R TBISECTION Service and Repair
Coil Assembly:
Remove or Disconnect
1. Negative battery cable.
2. DIS assembly from engine.
3. Coils from assembly.
4. Module from assembly plate.
Install or Connect
1. Module to assembly plate. (Carefully engage sensor to module terminals.)
2. Coils.
3. DIS assembly to engine.
4. Negative battery cable.
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.