Peter Oskam
New member
I recently bought a new 500L 1.4 T-jet and there is a subsound.
Shortly after you start driving there is a buzzing and whining noise.
It occurs after about 30 seconds and driving in 2, 3 or 4 gear at say 1750-2000 rpm.
The sound disappaers directly when you release the throttle just a bit and also when (with your other foot) you put just a liltle pressure on the brake pedal.
So when the vacuum of the inletmanifold changes the sound disappears
The garage changed already a few parts (dump valve ) but with no succes.
The sound appears 2 to 3 times and then no more.
But: when you switch off the egine (as to fill the fuel tank) then it is there again. When you continue driving you do`nt hear it anymore.
Anybody an idea?
Shortly after you start driving there is a buzzing and whining noise.
It occurs after about 30 seconds and driving in 2, 3 or 4 gear at say 1750-2000 rpm.
The sound disappaers directly when you release the throttle just a bit and also when (with your other foot) you put just a liltle pressure on the brake pedal.
So when the vacuum of the inletmanifold changes the sound disappears
The garage changed already a few parts (dump valve ) but with no succes.
The sound appears 2 to 3 times and then no more.
But: when you switch off the egine (as to fill the fuel tank) then it is there again. When you continue driving you do`nt hear it anymore.
Anybody an idea?