diff --git a/firmware/config/engines/custom_engine.cpp b/firmware/config/engines/custom_engine.cpp
index 5f57529d9a..fa0db9c3aa 100644
--- a/firmware/config/engines/custom_engine.cpp
+++ b/firmware/config/engines/custom_engine.cpp
@@ -103,7 +103,7 @@ void setCustomEngineConfiguration(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	 * Frankenso analog #11 PC5 ADC15
 	 * Frankenso analog #12 PC4 ADC14 VBatt
 	 */
-	engineConfiguration->tpsAdcChannel = EFI_ADC_2;
+	engineConfiguration->tpsAdcChannel = EFI_ADC_2; // PA2
 
 	engineConfiguration->map.sensor.hwChannel = EFI_ADC_0;
 
diff --git a/firmware/config/engines/ford_festiva.cpp b/firmware/config/engines/ford_festiva.cpp
index 30566ff17c..36794ab173 100644
--- a/firmware/config/engines/ford_festiva.cpp
+++ b/firmware/config/engines/ford_festiva.cpp
@@ -123,7 +123,7 @@ void setFordEscortGt(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	engineConfiguration->map.sensor.hwChannel = EFI_ADC_4;
 
 	setEgoSensor(ES_Innovate_MTX_L PASS_ENGINE_PARAMETER_SUFFIX);
-	engineConfiguration->afr.hwChannel = EFI_ADC_2; // Frankenso analog #5
+	engineConfiguration->afr.hwChannel = EFI_ADC_2; // Frankenso analog #5 // PA2
 
 	// set_idle_position 10
 	boardConfiguration->manIdlePosition = 10;
diff --git a/firmware/config/engines/mazda_miata.cpp b/firmware/config/engines/mazda_miata.cpp
index ef54082b0d..2a8e9ade36 100644
--- a/firmware/config/engines/mazda_miata.cpp
+++ b/firmware/config/engines/mazda_miata.cpp
@@ -293,7 +293,7 @@ static void setMiata1994_common(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 
 	commonFrankensoAnalogInputs(engineConfiguration);
 
-	engineConfiguration->tpsAdcChannel = EFI_ADC_2;
+	engineConfiguration->tpsAdcChannel = EFI_ADC_2; // PA2
 	engineConfiguration->map.sensor.hwChannel = EFI_ADC_4;
 	engineConfiguration->mafAdcChannel = EFI_ADC_0;
 	engineConfiguration->clt.adcChannel = EFI_ADC_12;
diff --git a/firmware/config/engines/mazda_miata_nb.cpp b/firmware/config/engines/mazda_miata_nb.cpp
index 617a08a22b..1045bf199f 100644
--- a/firmware/config/engines/mazda_miata_nb.cpp
+++ b/firmware/config/engines/mazda_miata_nb.cpp
@@ -44,7 +44,7 @@ void setMazdaMiataNb1EngineConfiguration(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	engineConfiguration->mafAdcChannel = EFI_ADC_1;
 	engineConfiguration->clt.adcChannel = EFI_ADC_11;
 	engineConfiguration->iat.adcChannel = EFI_ADC_13;
-	engineConfiguration->afr.hwChannel = EFI_ADC_2;
+	engineConfiguration->afr.hwChannel = EFI_ADC_2; // PA2
 
 	boardConfiguration->idle.solenoidPin = GPIOE_0;
 	boardConfiguration->idle.solenoidPinMode = OM_DEFAULT;
diff --git a/firmware/config/engines/mazda_miata_vvt.cpp b/firmware/config/engines/mazda_miata_vvt.cpp
index 9f3a6204d3..3de8726c6e 100644
--- a/firmware/config/engines/mazda_miata_vvt.cpp
+++ b/firmware/config/engines/mazda_miata_vvt.cpp
@@ -320,6 +320,11 @@ void setMazdaMiata2003EngineConfiguration(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 
 	boardConfiguration->etbControlPin1 = GPIOC_7;
 
+// default TPS is	engineConfiguration->tpsAdcChannel = EFI_ADC_2;
+	// it becomes pedal sensor on test mule
+	//engineConfiguration->pedalPositionAdcChannel = EFI_ADC_2; // PA2
+	// engineConfiguration->tpsAdcChannel = EFI_ADC_13; // PC3
+
 	// set_whole_ve_map 80
 
 	memcpy(config->veRpmBins, ve18vvtRpmBins, sizeof(ve18vvtRpmBins));