Specifications
| Item | Specification |
|---|---|
| Firing order | 1-5-4-2-6-3-7-8 |
| Spark plug type - Vehicles with supercharger | NGK-IFR-5N10 |
| Spark plug type - Vehicles without supercharger | NGK-IFR-5N10 |
General Specifications
| Description | Nm |
|---|---|
| Spark plugs | 27 |
| Ignition coil-on-plug retaining bolts | 5 |
Torque Specifications
Scheme 1
| Item Number | Description |
|---|---|
| 1 | Ignition coil-on-plug |
| 2 | Ignition coil-on-plug retaining bolt |
| 3 | Spark plug |
The right-hand cylinders are numbered 7, 5, 3, 1 and the left-hand cylinders are numbered 8, 6, 4, 2 when viewed from the rear of the engine.
An ignition coil is located on each individual spark plug allowing the ignition timing to be adjusted independently.
The crankshaft position (CKP) sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the CKP sensor is converted to a digital signal by the engine control module (ECM). This digital signal is then used to position the closing time of the primary circuit of the ignition coil. The effective range for ignition timing control is increased to the fact that there are no rotating parts.
On the basis of engine speed and load inputs, the ECM determines the ignition timing. This function also takes other inputs into consideration such as engine temperature, throttle position, knock control, camshaft position, traction control and electronic transmission control inputs.
This ignition system enables the customer to drive the vehicle home if an ignition coil or ignition coil wiring failure occurs. In the event of a wiring failure between the ECM and the ignition coil, the ignition coil will fail instead of the ignition coil fuse blowing, which will allow the remaining ignition coils to continue to function and the engine to limp home.