diff --git a/firmware/controllers/algo/advance_map.h b/firmware/controllers/algo/advance_map.h
index 9894831632..52f0077c47 100644
--- a/firmware/controllers/algo/advance_map.h
+++ b/firmware/controllers/algo/advance_map.h
@@ -19,6 +19,7 @@ size_t getMultiSparkCount(int rpm);
 class IgnitionState : public ignition_state_s {
 public:
 	IgnitionState() {
+	// todo https://github.com/rusefi/rusefi/issues/4308
 		luaTimingMult = 1;
 	}
 	floatms_t getSparkDwell(int rpm);
diff --git a/firmware/controllers/algo/engine2.cpp b/firmware/controllers/algo/engine2.cpp
index 8097577194..561bafe769 100644
--- a/firmware/controllers/algo/engine2.cpp
+++ b/firmware/controllers/algo/engine2.cpp
@@ -79,6 +79,8 @@ float FuelConsumptionState::getConsumptionGramPerSecond() const {
 
 EngineState::EngineState() {
 	timeSinceLastTChargeK = getTimeNowNt();
+	// todo: https://github.com/rusefi/rusefi/issues/4308
+	lua.fuelMult = 1;
 }
 
 void EngineState::updateSlowSensors() {
diff --git a/firmware/controllers/algo/engine_state.h b/firmware/controllers/algo/engine_state.h
index ff2ce162ce..fe907853cc 100644
--- a/firmware/controllers/algo/engine_state.h
+++ b/firmware/controllers/algo/engine_state.h
@@ -13,10 +13,6 @@
 #include "efi_pid.h"
 #include "engine_state_generated.h"
 
-struct LuaAdjustmentsLegacy {
-	float fuelMult = 1;
-};
-
 class EngineState : public engine_state_s {
 public:
 	EngineState();
@@ -75,6 +71,4 @@ public:
 
 	float targetLambda = 0.0f;
 	float stoichiometricRatio = 0.0f;
-
-	LuaAdjustmentsLegacy luaAdjustments;
 };
diff --git a/firmware/controllers/lua/lua.cpp b/firmware/controllers/lua/lua.cpp
index d2c6f5564c..d18404107a 100644
--- a/firmware/controllers/lua/lua.cpp
+++ b/firmware/controllers/lua/lua.cpp
@@ -310,7 +310,7 @@ void LuaThread::ThreadTask() {
 		bool wasOk = runOneLua(myAlloc, config->luaScript);
 
 		// Reset any lua adjustments the script made
-		engine->engineState.luaAdjustments = {};
+		// todo https://github.com/rusefi/rusefi/issues/4308 engine->engineState.luaAdjustments = {};
 
 		if (!wasOk) {
 			// Something went wrong executing the script, spin
diff --git a/firmware/controllers/lua/lua_hooks.cpp b/firmware/controllers/lua/lua_hooks.cpp
index 703fffe8b7..3c5d868cce 100644
--- a/firmware/controllers/lua/lua_hooks.cpp
+++ b/firmware/controllers/lua/lua_hooks.cpp
@@ -534,7 +534,7 @@ void configureRusefiLuaHooks(lua_State* l) {
 		return 0;
 	});
 	lua_register(l, "setFuelMult", [](lua_State* l) {
-		engine->engineState.luaAdjustments.fuelMult = luaL_checknumber(l, 1);
+		engine->engineState.lua.fuelMult = luaL_checknumber(l, 1);
 		return 0;
 	});
 #if EFI_PROD_CODE