What the Staging Indicator does
Staged injection brings in extra injectors once load passes a set point, the Staging Load Bar on the Fuel Setup page. The Staging Indicator function gives you a switched output that turns on whenever load is above that point and turns off when it drops back below. There's nothing to tune. You just enable it and pick an output.
Two things to know up front:
- It needs staged fuel. If staged injection isn't enabled in the fuel setup, the indicator never activates.
- It doesn't pulse. The output is a steady on/off signal that stays on the whole time you're above the staging point. It isn't an injector drive. If you need an output that actually pulses like an injector, use the Extra Injector output type instead.
Where we use it
- A dash warning light, so the driver knows when the secondary injectors are working.
- A relay that switches on a second fuel pump only when the staged injectors need the extra flow.
- A logged channel, handy when you're checking where staging happens during a pull.
Setting it up
Everything lives on the Wiring tab.
| Setting | What it does | Our advice |
|---|---|---|
| Second, Third and Fourth Stage Indicator | Turns on an indicator output for each stage of injection | Only enable the stages your fuel system actually has |
| Connections | The output wire for each enabled indicator | A spare DPO (digital pulsed output) or stepper output is the usual choice |
| Active State | Low grounds the output wire when the indicator is on. High inverts that, so the wire is grounded while the indicator is off. Default is Low. | Leave it on Low for a light or relay that's fed 12V and switched to ground |
ECU outputs switch to ground and are meant for small loads. Drive a small warning light directly if it's within the output's rating, but use a relay for anything that draws real current, such as a fuel pump.
Troubleshooting
If the output never comes on, check that staged fuel is enabled and that load actually passes the Staging Load Bar. If it's on when it should be off, the Active State is probably set to High. Running a Nexus instead? See the Nexus staging indicator page. Questions about your staged fuel system? Ask us.
