diff --git a/firmware/controllers/core/le_functions.cpp b/firmware/controllers/core/le_functions.cpp
index d64fbaff06..585c713bd9 100644
--- a/firmware/controllers/core/le_functions.cpp
+++ b/firmware/controllers/core/le_functions.cpp
@@ -19,6 +19,7 @@ static LENameOrdinalPair leFan(LE_METHOD_FAN, "fan");
 static LENameOrdinalPair leCoolant(LE_METHOD_COOLANT, "coolant");
 static LENameOrdinalPair leFanOnSetting(LE_METHOD_FAN_ON_SETTING, "fan_on_setting");
 static LENameOrdinalPair leFanOffSetting(LE_METHOD_FAN_OFF_SETTING, "fan_off_setting");
+static LENameOrdinalPair leTimeSinceBoot(LE_METHOD_TIME_SINCE_BOOT, "time_since_boot");
 
 
 #if EFI_PROD_CODE || EFI_SIMULATOR
diff --git a/firmware/controllers/core/logic_expression.cpp b/firmware/controllers/core/logic_expression.cpp
index 84206b05b6..984ab45b0b 100644
--- a/firmware/controllers/core/logic_expression.cpp
+++ b/firmware/controllers/core/logic_expression.cpp
@@ -56,6 +56,24 @@ void LECalculator::reset() {
 	stack.reset();
 }
 
+void LECalculator::reset(LEElement *element) {
+	first = NULL;
+	stack.reset();
+	add(element);
+}
+
+void LECalculator::add(LEElement *element) {
+	if (first == NULL) {
+		first = element;
+	} else {
+		LEElement *last = first;
+		while (last->next != NULL) {
+			last = last->next;
+		}
+		last->next = element;
+	}
+}
+
 static bool float2bool(float v) {
 	return v != 0;
 }
@@ -138,18 +156,6 @@ float LECalculator::getValue() {
 	return stack.pop();
 }
 
-void LECalculator::add(LEElement *element) {
-	if (first == NULL) {
-		first = element;
-	} else {
-		LEElement *last = first;
-		while (last->next != NULL) {
-			last = last->next;
-		}
-		last->next = element;
-	}
-}
-
 LEElementPool::LEElementPool() {
 	reset();
 }
@@ -159,6 +165,10 @@ void LEElementPool::reset() {
 }
 
 LEElement *LEElementPool::next() {
+	if (index == LE_ELEMENT_POOL_SIZE - 1) {
+		firmwareError("LE_ELEMENT_POOL_SIZE overflow");
+		return NULL;
+	}
 	return &pool[index++];
 }
 
diff --git a/firmware/controllers/core/logic_expression.h b/firmware/controllers/core/logic_expression.h
index 570136ca13..571a5549b1 100644
--- a/firmware/controllers/core/logic_expression.h
+++ b/firmware/controllers/core/logic_expression.h
@@ -52,7 +52,7 @@ public:
 	LEElement *next;
 };
 
-#define LE_ELEMENT_POOL_SIZE 64
+#define LE_ELEMENT_POOL_SIZE 256
 
 class LEElementPool {
 public:
@@ -73,6 +73,7 @@ public:
 	float getValue();
 	void add(LEElement *element);
 	void reset();
+	void reset(LEElement *element);
 
 private:
 	void doJob(LEElement *element);
diff --git a/firmware/controllers/engine_controller.cpp b/firmware/controllers/engine_controller.cpp
index a6aab10d6c..15455f09c9 100644
--- a/firmware/controllers/engine_controller.cpp
+++ b/firmware/controllers/engine_controller.cpp
@@ -52,6 +52,15 @@
 #include "ec2.h"
 #include "PwmTester.h"
 #include "engine.h"
+#include "logic_expression.h"
+
+#define FUEL_PUMP_LOGIC "time_since_boot 4 less rpm 0 > OR"
+
+LECalculator calc;
+
+LEElementPool lePool;
+LEElement * fuelPumpLogic;
+LEElement * radiatorFanLogic;
 
 extern board_configuration_s *boardConfiguration;
 
@@ -337,5 +346,7 @@ void initEngineContoller(void) {
 	}
 #endif
 
+	fuelPumpLogic = parseExpression(&lePool, FUEL_PUMP_LOGIC);
+
 	addConsoleAction("analoginfo", printAnalogInfo);
 }
diff --git a/unit_tests/test_logic_expression.cpp b/unit_tests/test_logic_expression.cpp
index 2101ef732d..a5d033c5df 100644
--- a/unit_tests/test_logic_expression.cpp
+++ b/unit_tests/test_logic_expression.cpp
@@ -106,7 +106,7 @@ void testLogicExpressions(void) {
 
 	/**
 	 * fuel_pump = (time_since_boot < 4 seconds) OR (rpm > 0)
-	 * fuel_pump = time_since_boot 4 less rpm 0 more OR
+	 * fuel_pump = time_since_boot 4 less rpm 0 > OR
 	 */
 
 	c.reset();