diff --git a/firmware/controllers/algo/rusefi_enums.h b/firmware/controllers/algo/rusefi_enums.h
index 9e387cdeda..b90241be5c 100644
--- a/firmware/controllers/algo/rusefi_enums.h
+++ b/firmware/controllers/algo/rusefi_enums.h
@@ -417,11 +417,15 @@ typedef enum {
 	Force_4b_pin_input_mode = ENUM_32_BITS,
 } pin_input_mode_e;
 
+#define CRANK_MODE_MULTIPLIER 2.0f
+
 // todo: better enum name
 typedef enum {
 	OM_NONE = 0,
 	/**
-	 * 720 degree engine cycle but trigger is defined using a 360 cycle which is when repeated
+	 * 720 degree engine cycle but trigger is defined using a 360 cycle which is when repeated.
+	 * For historical reasons we have a pretty weird approach where one crank trigger revolution is
+	 * defined as if it's stretched to 720 degress. See CRANK_MODE_MULTIPLIER
 	 */
 	FOUR_STROKE_CRANK_SENSOR = 1,
 	/**
diff --git a/firmware/controllers/trigger/decoders/trigger_chrysler.cpp b/firmware/controllers/trigger/decoders/trigger_chrysler.cpp
index 7c687c2a26..513adcde61 100644
--- a/firmware/controllers/trigger/decoders/trigger_chrysler.cpp
+++ b/firmware/controllers/trigger/decoders/trigger_chrysler.cpp
@@ -447,6 +447,7 @@ static void configureNeon1995TriggerShapeCommon(bool withCam, TriggerShape *s DE
 }
 
 void configureNeon1995TriggerShapeOnlyCrank(TriggerShape *s DECLARE_ENGINE_PARAMETER_SUFFIX) {
+	s->initialize(FOUR_STROKE_CRANK_SENSOR, false);
 
 	configureNeon1995TriggerShapeCommon(false, s PASS_ENGINE_PARAMETER_SUFFIX);
 }
diff --git a/firmware/controllers/trigger/decoders/trigger_gm.cpp b/firmware/controllers/trigger/decoders/trigger_gm.cpp
index 51418859a8..2cbde0fcfc 100644
--- a/firmware/controllers/trigger/decoders/trigger_gm.cpp
+++ b/firmware/controllers/trigger/decoders/trigger_gm.cpp
@@ -13,7 +13,7 @@ void configureGmTriggerShape(TriggerShape *s DECLARE_ENGINE_PARAMETER_SUFFIX) {
 	// all angles are x2 here - so, 5 degree width is 10
 	float w = 10;
 
-	float m = 2.0;
+	float m = CRANK_MODE_MULTIPLIER;
 
 	s->addEvent2(m * 60 - w, T_PRIMARY, TV_RISE PASS_ENGINE_PARAMETER_SUFFIX);
 	s->addEvent2(m * 60, T_PRIMARY, TV_FALL PASS_ENGINE_PARAMETER_SUFFIX);
@@ -51,6 +51,7 @@ void initGmLS24(TriggerShape *s DECLARE_ENGINE_PARAMETER_SUFFIX) {
 
 	/**
 	 * based on http://rusefi.com/forum/viewtopic.php?f=3&t=936&start=30 logs
+	 * todo: do we have one cycle or two cycles here? where is CRANK_MODE_MULTIPLIER?
 	 */
 	s->addEvent2(22.2733333333334, ch, TV_RISE PASS_ENGINE_PARAMETER_SUFFIX);
 	s->addEvent2(27.59333333333338, ch, TV_FALL PASS_ENGINE_PARAMETER_SUFFIX);