diff --git a/firmware/config/boards/proteus/board_configuration.cpp b/firmware/config/boards/proteus/board_configuration.cpp
index 7169d6d6c5..d9554e730e 100644
--- a/firmware/config/boards/proteus/board_configuration.cpp
+++ b/firmware/config/boards/proteus/board_configuration.cpp
@@ -124,6 +124,7 @@ static void setupDefaultSensorInputs() {
 	engineConfiguration->tps1_1AdcChannel = PROTEUS_IN_TPS;
 	engineConfiguration->map.sensor.hwChannel = PROTEUS_IN_MAP;
 
+    // see also enableAemXSeries
 	// pin #28 WBO AFR "Analog Volt 10"
 	engineConfiguration->afr.hwChannel = PROTEUS_IN_ANALOG_VOLT_10;
 }
diff --git a/firmware/config/engines/harley.cpp b/firmware/config/engines/harley.cpp
index 5636838eae..1d95c3ff5c 100644
--- a/firmware/config/engines/harley.cpp
+++ b/firmware/config/engines/harley.cpp
@@ -25,6 +25,8 @@ void proteusHarley() {
 	engineConfiguration->scriptSetting[0] = 300;
 	strcpy(engineConfiguration->scriptSettingName[1], "compReleaseDur");
 	engineConfiguration->scriptSetting[1] = 5000;
+	engineConfiguration->afr.hwChannel = EFI_ADC_NONE;
+	engineConfiguration->enableAemXSeries = true;
 
 	// for now we need non wired camInput to keep TS field enable/disable logic happy
 	engineConfiguration->camInputs[0] = PROTEUS_DIGITAL_6;