diff --git a/firmware/controllers/algo/engine.h b/firmware/controllers/algo/engine.h
index 47ad33760d..360496aedd 100644
--- a/firmware/controllers/algo/engine.h
+++ b/firmware/controllers/algo/engine.h
@@ -94,7 +94,7 @@ public:
 	AcState acState;
 	bool enableOverdwellProtection = true;
 	bool isPwmEnabled = true;
-	int triggerActivitySecond = 0;
+	int triggerActivitySecond = -99;
 
 	const char *prevOutputName = nullptr;
 
diff --git a/firmware/controllers/core/fsio_impl.cpp b/firmware/controllers/core/fsio_impl.cpp
index a352ec3c7d..cd23faea2a 100644
--- a/firmware/controllers/core/fsio_impl.cpp
+++ b/firmware/controllers/core/fsio_impl.cpp
@@ -720,7 +720,9 @@ void runHardcodedFsio(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	}
 	// see FUEL_PUMP_LOGIC
 	if (isBrainPinValid(CONFIG(fuelPumpPin))) {
-		enginePins.fuelPumpRelay.setValue((getTimeNowSeconds() < engine->triggerActivitySecond + engineConfiguration->startUpFuelPumpDuration) || (engine->rpmCalculator.getRpm() > 0));
+		int triggerActivityOrEcuStartSecond = maxI(0, engine->triggerActivitySecond);
+
+		enginePins.fuelPumpRelay.setValue((getTimeNowSeconds() < triggerActivityOrEcuStartSecond + engineConfiguration->startUpFuelPumpDuration) || (engine->rpmCalculator.getRpm() > 0));
 	}
 	
 	enginePins.o2heater.setValue(engine->rpmCalculator.isRunning());