What it does
A single cylinder running lean, for example from a clogged injector, often shows up first as that cylinder's exhaust gas temperature (EGT) climbing away from the rest. Cylinder Shutdown watches for exactly that. When a cylinder's EGT goes over your limit for long enough, the ECU cuts both ignition and injection to that cylinder only, and the rest of the engine keeps running.
The cut is latched. It stays in place until the ECU is reset or power cycled, so a damaged cylinder can't quietly come back to life mid-session.
What you need
The option only appears once exhaust gas temperature is enabled with a separate sensor for every cylinder. That usually means a thermocouple in each runner and an amplifier such as the TCA8 eight-channel thermocouple amplifier.
Settings
| Setting | What it does |
|---|---|
| Enable | Turns per-cylinder shutdown on |
| Max EGT | The temperature a cylinder must exceed to be shut down |
| Delay | How long the EGT must stay above Max EGT before the cut happens, so a brief spike can't trigger it |
We set Max EGT from what the engine actually does on a healthy run, with sensible headroom above the hottest normal cylinder, and keep the delay short enough to act before damage but long enough to ignore momentary spikes. For more on sensor choice and placement, see EGT sensors explained, and pair this with the wider engine protection setup.
