A while back I posted on here that I was hearing a ticking sound, during acceleration, under boost around 2500-3500rpms. When in Park, if I was to rev the engine up to those rpms, there was no ticking noise.
I took it to the dealer at 3000kms on the odometer and left it with them overnight and a day. They replicated the noise and said that it is a common noise on engines that have a valve/flap that regulates the intake pressure. In the 2.5T's case, the dealer is saying the intake manifold (dynamic pressure system). They had no fix, and said it was normal....also commonly heard on the MS6 engine from what they say.
So ever since then I decided to switch over to no lower than 91 octane fuel for the added hp bump (which is very noticeable above 5000rpms btw)....to my ears, the ticking noise went away after 3 or 4 tanks using 91 Octane.
....NOW, I'm at 11,000kms.... I just recently filled up with 87 octane after the tank was empty. Low and behold, the ticking noise is back.......
my 2.5T pings or knocks!.... this is surprising since 87 is the minimum recommended fuel.
I am asking my fellow owners if you hear the same ping/knock noise from the engine with 87 Octane. Do the following:
-Radio off
-HVAC off
-find a quiet location
-windows up
-from a stop accelerate fairly aggressively up to 2500rpms and holding the boost/rpms around 3000rpms
I hear the noise coming in front of the passenger side engine bay when driving.
I need to know if this is an isolated case with my vehicle, or is this something common.
Thanks All!
I took it to the dealer at 3000kms on the odometer and left it with them overnight and a day. They replicated the noise and said that it is a common noise on engines that have a valve/flap that regulates the intake pressure. In the 2.5T's case, the dealer is saying the intake manifold (dynamic pressure system). They had no fix, and said it was normal....also commonly heard on the MS6 engine from what they say.
So ever since then I decided to switch over to no lower than 91 octane fuel for the added hp bump (which is very noticeable above 5000rpms btw)....to my ears, the ticking noise went away after 3 or 4 tanks using 91 Octane.
....NOW, I'm at 11,000kms.... I just recently filled up with 87 octane after the tank was empty. Low and behold, the ticking noise is back.......
my 2.5T pings or knocks!.... this is surprising since 87 is the minimum recommended fuel.
I am asking my fellow owners if you hear the same ping/knock noise from the engine with 87 Octane. Do the following:
-Radio off
-HVAC off
-find a quiet location
-windows up
-from a stop accelerate fairly aggressively up to 2500rpms and holding the boost/rpms around 3000rpms
I hear the noise coming in front of the passenger side engine bay when driving.
I need to know if this is an isolated case with my vehicle, or is this something common.
Thanks All!