The firing order specifies the sequence in which spark plugs ignite the air-fuel mixture in each cylinder. For a properly functioning engine, it's crucial to maintain the correct order to prevent misfires, rough idling, or reduced power in your Chevy Traverse.
Chevy Traverse 3.6L Firing Order Details
The standard firing order for the 3.6L V6 engine is 1-6-5-4-3-2. Cylinders are numbered: passenger side (front to rear) as 1-3-5, and driver's side as 2-4-6. Always verify this against your owner's manual before proceeding.
How to Check Firing Order Yourself
- Gather tools: Use a digital multimeter, spark plug socket, and gap gauge. Ensure the engine is cool and disconnected from the battery.
- Inspect spark plug wires: Trace each wire from the distributor to cylinder, comparing against the 1-6-5-4-3-2 order. Misalignment indicates incorrect routing.
- Test spark plug gaps: Remove wires one at a time, measure the gap with a gauge (spec: 0.040-0.050 inches), and recheck connections.
- Listen for misfires: Start the engine briefly; a stuttering sound or check engine light suggests issues. Use an OBD-II scanner for error codes like P0300 (random misfire).
How to Fix Incorrect Firing Order
- Reorder spark plug wires: Disconnect the battery, then detach wires from distributor and cylinders. Reattach according to 1-6-5-4-3-2 sequence, ensuring snug connections.
- Replace faulty components: If wires are damaged or spark plugs worn, swap with new ones following manufacturer specs. Torque spark plugs to 15-20 ft-lbs.
- Reset the system: Reconnect battery and clear error codes with your scanner. Test-run the engine; if issues persist, consult cylinder compression tests.
Safety Precautions
- Work in ventilated area: Avoid fumes by not running the engine indoors.
- Wear protective gear: Use gloves and eye protection to prevent electric shock or burns.
- Disconnect battery: Prevent accidental starts or short circuits during repairs.
Regularly inspect your firing order during tune-ups to ensure optimal performance. If problems recur, seek professional diagnosis for underlying issues like distributor cap wear or sensor failures.
