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 DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/C - ODORS ON HOT/HUMID START UPINSTALLATION PRECAUTIONS
1987 Pontiac J2000/Sunbird L4-121 2.0L
Installation Precautions
1987 Pontiac J2000/Sunbird L4-121 2.0LSECTION Installation Precautions
^ Disconnect the negative battery cable before performing any electrical hook-ups.
^ All the connections of the afterblow module harness to the vehicle wiring should be performed using the technique described in Section 8A of the Service Manual. Splices/connections should be made using splice clips, or solder. Do not use instant connectors such as 3M's "Scotchblock" brand, ^ All unused module wires must be taped and secured to prevent future electrical problems.
^ The afterblow module is not compatible with some non-factory installed theft alarm systems. The module current draw in the key off position could trigger alarms that sense battery voltage changes or current drain.
^ All the connections of the afterblow module harness to the vehicle wiring should be performed using the technique described in Section 8A of the Service Manual. Splices/connections should be made using splice clips, or solder. Do not use instant connectors such as 3M's "Scotchblock" brand, ^ All unused module wires must be taped and secured to prevent future electrical problems.
^ The afterblow module is not compatible with some non-factory installed theft alarm systems. The module current draw in the key off position could trigger alarms that sense battery voltage changes or current drain.
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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.