diff --git a/unit_tests/tests/lua/test_lua_e38.cpp b/unit_tests/tests/lua/test_lua_e38.cpp
new file mode 100644
index 0000000000..60dfd7397a
--- /dev/null
+++ b/unit_tests/tests/lua/test_lua_e38.cpp
@@ -0,0 +1,40 @@
+#include "pch.h"
+#include "rusefi_lua.h"
+#include "lua_lib.h"
+
+/**
+ * MSB bit conversion insanity
+ * data[1] means start offset 7
+ * data[2] means start offset 15
+ * data[3] means start offset 23
+ * data[4] means start offset 31
+ * data[5] means start offset 39
+ * data[6] means start offset 47
+ * data[7] means start offset 55
+ * data[8] means start offset 63
+ */
+
+#define ECMEngineStatus "\ndata = { 0x80, 0x20, 0x29, 0x16, 0x0F, 0x40, 0x08, 0x00}\n "
+
+TEST(LuaE38, rpm) {
+
+	const char* script = TWO_BYTES_MSB ECMEngineStatus R"(
+		function testFunc()
+			rpm = getTwoBytesMSB(data, 2, 0.25)
+			return rpm
+		end
+		)";
+	EXPECT_NEAR_M3(testLuaReturnsNumberOrNil(script).value_or(0), 2629.5);
+}
+
+
+TEST(LuaE38, tps) {
+
+	const char* script = TWO_BYTES_MSB ECMEngineStatus R"(
+		function testFunc()
+			tps = data[5] * 0.3921
+			return tps
+		end
+		)";
+	EXPECT_NEAR_M3(testLuaReturnsNumberOrNil(script).value_or(0), 5.881);
+}
diff --git a/unit_tests/tests/tests.mk b/unit_tests/tests/tests.mk
index 1f2b6788ba..275402662f 100644
--- a/unit_tests/tests/tests.mk
+++ b/unit_tests/tests/tests.mk
@@ -32,6 +32,7 @@ TESTS_SRC_CPP = \
 	tests/ignition_injection/test_injector_model.cpp \
 	tests/lua/test_lua_basic.cpp \
 	tests/lua/test_lookup.cpp \
+	tests/lua/test_lua_e38.cpp \
 	tests/lua/test_lua_e65.cpp \
 	tests/lua/test_lua_ford.cpp \
 	tests/lua/test_lua_vag.cpp \