diff --git a/firmware/controllers/engine_cycle/spark_logic.cpp b/firmware/controllers/engine_cycle/spark_logic.cpp
index c5c56f05e7..8e2eae121f 100644
--- a/firmware/controllers/engine_cycle/spark_logic.cpp
+++ b/firmware/controllers/engine_cycle/spark_logic.cpp
@@ -126,10 +126,16 @@ static void prepareCylinderIgnitionSchedule(angle_t dwellAngleDuration, floatms_
 }
 
 static void chargeTrailingSpark(IgnitionOutputPin* pin) {
+#if SPARK_EXTREME_LOGGING
+	efiPrintf("chargeTrailingSpark %s", pin->name);
+#endif /* SPARK_EXTREME_LOGGING */
 	pin->setHigh();
 }
 
 static void fireTrailingSpark(IgnitionOutputPin* pin) {
+#if SPARK_EXTREME_LOGGING
+	efiPrintf("fireTrailingSpark %s", pin->name);
+#endif /* SPARK_EXTREME_LOGGING */
 	pin->setLow();
 }
 
@@ -202,6 +208,10 @@ if (engineConfiguration->debugMode == DBG_DWELL_METRIC) {
 		engine->executor.scheduleByTimestampNt("firing", &event->sparkEvent.scheduling, nextFiring, { fireSparkAndPrepareNextSchedule, event });
 	} else {
 		if (CONFIG(enableTrailingSparks)) {
+#if SPARK_EXTREME_LOGGING
+	efiPrintf("scheduleByAngle TrailingSparks");
+#endif /* SPARK_EXTREME_LOGGING */
+
 			// Trailing sparks are enabled - schedule an event for the corresponding trailing coil
 			scheduleByAngle(
 				&event->trailingSparkFire, nowNt, ENGINE(engineState.trailingSparkAngle),
diff --git a/firmware/controllers/system/efi_gpio.cpp b/firmware/controllers/system/efi_gpio.cpp
index de33736c9f..c0af5bac1a 100644
--- a/firmware/controllers/system/efi_gpio.cpp
+++ b/firmware/controllers/system/efi_gpio.cpp
@@ -305,7 +305,16 @@ const char *NamedOutputPin::getShortName() const {
 	return shortName == nullptr ? name : shortName;
 }
 
+#if EFI_UNIT_TEST
+extern bool verboseMode;
+#endif // EFI_UNIT_TEST
+
 void NamedOutputPin::setHigh() {
+#if EFI_UNIT_TEST
+	if (verboseMode) {
+		efiPrintf("pin %s goes high", name);
+	}
+#endif // EFI_UNIT_TEST
 #if EFI_DEFAILED_LOGGING
 //	signal->hi_time = hTimeNow();
 #endif /* EFI_DEFAILED_LOGGING */
@@ -319,6 +328,12 @@ void NamedOutputPin::setHigh() {
 }
 
 void NamedOutputPin::setLow() {
+#if EFI_UNIT_TEST
+	if (verboseMode) {
+		efiPrintf("pin %s goes low", name);
+	}
+#endif // EFI_UNIT_TEST
+
 	// turn off the output
 	setValue(false);
 
@@ -402,6 +417,12 @@ void OutputPin::setValue(int logicValue) {
 //	ScopePerf perf(PE::OutputPinSetValue);
 #endif // ENABLE_PERF_TRACE
 
+#if EFI_UNIT_TEST
+	if (verboseMode) {
+		efiPrintf("pin goes %d", logicValue);
+	}
+#endif // EFI_UNIT_TEST
+
 	// Always store the current logical value of the pin (so it can be
 	// used internally even if not connected to a real hardware pin)
 	currentLogicValue = logicValue;