2010 infiniti g37 firing order
2010 Infiniti G37 Firing Order: Complete Diagnostic & Tune-Up Guide
Key Takeaways
- Firing Order:
1-4-2-5-3-6 - Engine: 3.7L VQ37VHR V6 (naturally aspirated)
- Cylinder Layout: Bank 1 (Left / Driver Side): 1-3-5 | Bank 2 (Right / Passenger Side): 2-4-6
- Cylinder 1 Position: Front-left (driver's side, belt-end)
- Common Mistake: Reversing the banks or reading cylinder numbers backward causes misfires and cross-threading
What Is the 2010 Infiniti G37 Firing Order?
The 2010 Infiniti G37 uses the VQ37VHR 3.7-liter V6 engine. Its firing order is:
1 → 4 → 2 → 5 → 3 → 6
This sequential firing pattern ensures smooth power delivery across both banks. Each cylinder fires in a 120° interval, which is standard for a well-balanced V6 configuration.
Whether you're replacing ignition coils, reinstalling spark plug wires, troubleshooting a misfire, or rebuilding the timing system, getting this sequence exactly right is critical. A single misaligned wire or coil pack will cause a rough idle, check-engine light, and potential catalytic converter damage.
VQ37VHR Cylinder Layout Explained
Before wiring or servicing, you must understand how the V6 is physically arranged under the hood. This is where most DIYers make costly errors.
Which Side Is Bank 1?
Bank 1 = Driver's side (left side when facing the car from the front). This is consistent with all Nissan/Infiniti V6 engines from the VQ family.
Cylinder Positions on Each Bank
| Bank | Side | Cylinders (Front → Rear) |
|---|---|---|
| Bank 1 | Driver (Left) | 1 — 3 — 5 |
| Bank 2 | Passenger (Right) | 2 — 4 — 6 |
Where Is Cylinder 1?
Cylinder 1 is the frontmost cylinder on the driver's side (the side with the serpentine belt). It sits closest to the radiator end of the engine. If you remove the engine cover, you can visually confirm this by locating the timing belt cover facing the front of the car.
Pre-Work Verification Checklist
- [ ] Confirm the engine is the 3.7L VQ37VHR (not the older 3.5L VQ35DE/Q)
- [ ] Identify the front of the engine (serpentine belt / accessory drive side)
- [ ] Locate Bank 1 on the driver's side
- [ ] Verify cylinder 1 is the front-most plug/coil on Bank 1
- [ ] Cross-reference with a known good coil-pack harness diagram before disconnecting anything
Why Does the Firing Order Matter on the G37?
The firing order directly affects three critical systems on your G37:
1. Ignition Timing & Engine Balance
The VQ37VHR is a DOHC 24-valve engine with individual coil-on-plug ignition. Each coil must fire at precisely the right moment. An incorrect firing sequence disrupts the 120° power stroke intervals, causing vibration, power loss, and accelerated wear on the crankshaft pulley and balance shafts.
2. Catalytic Converter Health
When misfires occur due to wrong wiring, unburned fuel enters the exhaust and ignites inside the catalytic converter. This glazes and melts the precious-metal honeycomb, leading to a $2,000+ replacement. Correct firing order prevents this cascade.
3. Misfire Diagnostic Accuracy
The G37's ECU monitors Bank 1 and Bank 2 misfire counters separately via the OBD-II port. If you rewire coils incorrectly, the ECU will log a P0301 through P0306 code — but the code references the wrong physical cylinder if the harness is swapped. Knowing the true firing order lets you interpret codes correctly.
Comparing the VQ37VHR to the Older VQ35DE
Many G35 owners who upgrade to a G37 (or swap engines) confuse the two platforms. Here's how they compare:
| Specification | VQ37VHR (G37) | VQ35DE/Q (G35) |
|---|---|---|
| Displacement | 3.7L (3,696 cc) | 3.5L (3,498 cc) |
| Firing Order | 1-4-2-5-3-6 | 1-4-2-5-3-6 |