Thread: Turbo Actuator hissing

I have been having some problems with my car B7 a4 2.0tdi 140 for a while, it is not running smoothly and is underpowered, almost like you really have to boot it to get the turbo to kick in, have tried a number of things to sort this but I still haven't really solved the problem.

Today it was the turn of the Turbo veins, I plugged in VAGcom and with the engine running set it to activate the actuator on and off to see if the veins were sticking, they seemed to move freely but whenever the vacuum was on there was a hissing coming from the actuator, Is this normal?

If I removed the vacuum pipe the hissing stopped even if I put my finger over the pipe to put the vacuum pump under load.

It sounds to me like there is a leak in the diaphragm in the actuator but I don't know if this is possible or how it works.

Any help would be greatly appreciated

Cheers

my brothers jetta had a similar issue m8 but it blew the turbo before he had it repaired or looked at, apparantly vw told him the actuators are prown to failure maybe worth giving vw a ring to ask them

Great, thanks, i'll call Audi a call tomorrow,

I'm assuming that if the actuator is only slightly faulty it will operate ok on idle when the turbo isn't under load but might not have enough pull to keep the veins in position when its working hard?