diff --git a/lua/entities/acf_engine/init.lua b/lua/entities/acf_engine/init.lua
index 8eb071e5a..1bfa7ef8b 100644
--- a/lua/entities/acf_engine/init.lua
+++ b/lua/entities/acf_engine/init.lua
@@ -127,7 +127,7 @@ local function GetPitchVolume(Engine)
 	local RPM = Engine.FlyRPM
 	local Pitch = Clamp(20 + (RPM * Engine.SoundPitch) * 0.02, 1, 255)
 	-- Rev limiter code disabled because it has issues with the volume delta time, but it's still here if we need it
-	local Throttle = --[[Engine.RevLimited and 0 or]] Engine.Throttle
+	local Throttle = Engine.Throttle -- Engine.RevLimited and 0 or Engine.Throttle
 	local Volume = 0.25 + (0.1 + 0.9 * ((RPM / Engine.LimitRPM) ^ 1.5)) * Throttle * 0.666
 
 	return Pitch, Volume * Engine.SoundVolume
@@ -611,9 +611,11 @@ end
 
 function ENT:UpdateSound(SelfTbl)
 	SelfTbl = SelfTbl or self:GetTable()
-	local Path = SelfTbl.SoundPath
 
-	if Path ~= SelfTbl.LastSound then
+	local Path      = SelfTbl.SoundPath
+	local LastSound = SelfTbl.LastSound
+
+	if Path ~= LastSound and LastSound ~= nil then
 		self:DestroySound()
 
 		SelfTbl.LastSound = Path
diff --git a/lua/entities/acf_engine_update/init.lua b/lua/entities/acf_engine_update/init.lua
index 19de42488..2d12547da 100644
--- a/lua/entities/acf_engine_update/init.lua
+++ b/lua/entities/acf_engine_update/init.lua
@@ -135,7 +135,7 @@ local function GetPitchVolume(Engine)
 	local RPM = Engine.FlyRPM
 	local Pitch = Clamp(20 + (RPM * Engine.SoundPitch) * 0.02, 1, 255)
 	-- Rev limiter code disabled because it has issues with the volume delta time, but it's still here if we need it
-	local Throttle = --[[Engine.RevLimited and 0 or]] Engine.Throttle
+	local Throttle = Engine.Throttle -- Engine.RevLimited and 0 or Engine.Throttle
 	local Volume = 0.25 + (0.1 + 0.9 * ((RPM / Engine.LimitRPM) ^ 1.5)) * Throttle * 0.666
 
 	return Pitch, Volume * Engine.SoundVolume
@@ -629,9 +629,11 @@ end
 
 function ENT:UpdateSound(SelfTbl)
 	SelfTbl = SelfTbl or self:GetTable()
-	local Path = SelfTbl.SoundPath
 
-	if Path ~= SelfTbl.LastSound then
+	local Path      = SelfTbl.SoundPath
+	local LastSound = SelfTbl.LastSound
+
+	if Path ~= LastSound and LastSound ~= nil then
 		self:DestroySound()
 
 		SelfTbl.LastSound = Path