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 MANUALSPONTIAC1987J2000/SUNBIRD L4-121 2.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION CONTROL MODULESERVICE AND REPAIR
1987 Pontiac J2000/Sunbird L4-121 2.0L
Ignition Control Module: Service and Repair
1987 Pontiac J2000/Sunbird L4-121 2.0LSECTION Service and Repair
Fig. 9 Removing DIS module assembly. 4-121/2.0L models:
Fig. 10 Removing DIS module assembly. 4-151/2.5L models:
Fig. 11 Removing DIS module assembly. V6-173 2.8L models:
1. Disconnect battery ground cable.
2. Disconnect DIS module assembly electrical connectors, Figs. 9 through 11.
3. Disconnect spark plug wires from module assembly, noting proper location to facilitate installation.
4. Remove DIS module assembly to engine block attaching bolts, then separate DIS module assembly from engine.
5. On models with 4-151/2.5L engines, inspect crankshaft sensor O-ring for wear, cracks, or leakage and replace as necessary. Apply engine oil to new O-ring prior to installation.
6. Assemble DIS module assembly to engine.
7. Insert attaching bolts, then torque to 20 ft. lbs. on 4 cylinder models and 19 ft. lbs. on V6 models.
8. Connect spark plug wires to their respectful coils.
9. Connect DIS module assembly electrical connectors, then the battery ground cable.
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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.