Wire by cylinder number, not firing order
For sequential injection on an Elite, match each injector output to the cylinder with the same number: INJ1 goes to cylinder 1, INJ2 to cylinder 2, and so on through the engine. Don't try to re-order the wiring to suit the firing order. The ECU takes care of that for you using the firing order you enter on the Advanced tab of the Main setup page in ESP.
That keeps the harness logical and makes fault finding far easier. If cylinder 5 is running lean, you know INJ5 is the output to check.
Semi-sequential is different
In semi-sequential mode, the ECU ignores the firing order and simply fires the outputs in numeric order: INJ1, INJ2, INJ3, INJ4 and onward. If you plan to run semi-sequential, keep that in mind when you work out which cylinders share timing.
| Injection mode | Output order | Set by |
|---|---|---|
| Sequential | Follows the engine's firing order | Firing order in ESP |
| Semi-sequential | INJ1, INJ2, INJ3 and so on | Fixed, regardless of firing order |
Our checks before first start
- Confirm the firing order in ESP matches the engine, especially on V8s where different engine families use different orders.
- Use the injector test to click each injector in turn and confirm the right one fires.
Want the example eight-cylinder wiring layout? Ask us and we'll send it over with advice for your build. See also fuel injector wiring and ignition wiring.
