Tools You'll Need:
* New spark plug wires: Make sure you get the correct wires for your specific year and engine. The length and connector types are critical.
* Socket wrench and extension (likely 5/16" or 7/16" for the spark plug wires): This depends on the size of the spark plug wire nuts holding the wires to the spark plugs and distributor.
* Needle-nose pliers: Helpful for maneuvering wires into tight spaces.
* Wrench or socket for distributor cap (if applicable): Some S10s had distributor caps; others used coil packs.
* Gloves: To protect your hands.
* Shop rag or paper towels: To keep things clean.
* Diagram (highly recommended): Find a diagram showing the correct firing order for your engine. This is crucial to get the wires in the right place. Your owner's manual or a reliable online resource (like a repair manual specific to your S10's year and engine) will have this.
Steps:
1. Safety First: Disconnect the negative (-) battery terminal before starting any work.
2. Locate the Spark Plugs and Distributor/Coil Pack: Identify the location of your spark plugs. They're typically near the top of the engine. If your S10 has a distributor cap, you'll need to remove it to access the spark plug wires. If it has a coil pack, the wires connect directly to the individual coils.
3. Identify the Firing Order: Find the correct firing order for your specific engine. This is critical. Getting the wires wrong will cause misfires and engine damage.
4. Remove the Old Wires: Carefully pull off each spark plug wire one at a time. Use needle-nose pliers to help grip the wire boot if it's stuck. Note which wire goes where; taking pictures is highly recommended.
5. Inspect the Spark Plugs (Optional but Recommended): While you're there, it's a good idea to inspect the spark plugs. If they're worn or fouled, replace them as well.
6. Install the New Wires: Carefully push the new spark plug wires onto the spark plugs, making sure they're fully seated. If you have a distributor cap, install them in the correct order according to your firing order diagram. If you have a coil pack, ensure each wire is securely connected to its corresponding coil. Again, your diagram is your best friend here.
7. Reconnect the Distributor Cap (if applicable): If your S10 uses a distributor, carefully replace the cap, ensuring it's securely fastened.
8. Reconnect the Battery: Reconnect the negative (-) battery terminal.
9. Start the Engine: Start the engine and listen for any misfires. If you hear misfiring (rough running, sputtering), double-check the firing order and the wire connections.
Important Considerations:
* Routing: Try to route the new wires similarly to the old ones, avoiding sharp bends or contact with hot engine parts. Proper routing helps prevent premature wire failure.
* Tightness: Ensure all wire connections are secure. Loose connections can lead to misfires.
* Year and Engine: The specific procedure might vary slightly depending on the year and engine of your S10. Always consult a repair manual specific to your vehicle.
If you're uncomfortable performing this repair yourself, it's best to take your S10 to a qualified mechanic. Incorrectly installed wires can cause serious engine damage.
