diff --git a/firmware/controllers/algo/engine.h b/firmware/controllers/algo/engine.h
index 08264430f2..dc91cbf19b 100644
--- a/firmware/controllers/algo/engine.h
+++ b/firmware/controllers/algo/engine.h
@@ -68,6 +68,7 @@ public:
 
 	AuxActor auxValves[AUX_DIGITAL_VALVE_COUNT][2];
 
+	bool needTdcCallback = true;
 	/**
 	 * if 2nd TPS is not configured we do not run 2nd ETB
 	 */
diff --git a/firmware/controllers/engine_cycle/rpm_calculator.cpp b/firmware/controllers/engine_cycle/rpm_calculator.cpp
index 9259f918ad..32caf18c03 100644
--- a/firmware/controllers/engine_cycle/rpm_calculator.cpp
+++ b/firmware/controllers/engine_cycle/rpm_calculator.cpp
@@ -296,6 +296,9 @@ static char rpmBuffer[_MAX_FILLER];
  * digital sniffer.
  */
 static void onTdcCallback(Engine *engine) {
+	if (!engine->needTdcCallback) {
+		return;
+	}
 	EXPAND_Engine;
 	itoa10(rpmBuffer, GET_RPM());
 #if EFI_ENGINE_SNIFFER