diff --git a/firmware/controllers/trigger/spark_logic.cpp b/firmware/controllers/trigger/spark_logic.cpp
index 3d6f0dd220..04b4ec84be 100644
--- a/firmware/controllers/trigger/spark_logic.cpp
+++ b/firmware/controllers/trigger/spark_logic.cpp
@@ -459,7 +459,7 @@ int getNumberOfSparks(ignition_mode_e mode DECLARE_ENGINE_PARAMETER_SUFFIX) {
  * @see getInjectorDutyCycle
  */
 percent_t getCoilDutyCycle(int rpm DECLARE_ENGINE_PARAMETER_SUFFIX) {
-	floatms_t totalPerCycle = 1/**getInjectionDuration(rpm PASS_ENGINE_PARAMETER_SUFFIX)*/ * getNumberOfSparks(getCurrentIgnitionMode(PASS_ENGINE_PARAMETER_SIGNATURE) PASS_ENGINE_PARAMETER_SUFFIX);
+	floatms_t totalPerCycle = ENGINE(engineState.sparkDwell) * getNumberOfSparks(getCurrentIgnitionMode(PASS_ENGINE_PARAMETER_SIGNATURE) PASS_ENGINE_PARAMETER_SUFFIX);
 	floatms_t engineCycleDuration = getCrankshaftRevolutionTimeMs(rpm) * (engine->getOperationMode(PASS_ENGINE_PARAMETER_SIGNATURE) == TWO_STROKE ? 1 : 2);
 	return 100 * totalPerCycle / engineCycleDuration;
 }