faulty n75?

[iggyrs]

I just bought my first gti, love it so far, but after a bit of searching on here it seems my n75 valve is faulty, I am getting what sounds like waste gate chatter (I had huge amounts of this on my old cossie and my old skyline) and it does sound the nutts, but from what I have read its a very different/bad thing on these, can someone tell me if all I need to do is change the n75 and it will be ok again? of is there more to the problem, the car is totally standard at the moment, I am fitting some guages and a dump valve tomorrow, but this sounds more important.

Any help would be great, as I dont really know much about these engines yet, the code is AUM if it helps


cheers

[daz veedub]

N75 issues would be loss of boost i.e limp mode, does it have an induction filter fitted and avoid dump valves u want a 007p/008p diverter valve  from forge also awesome gti do them or even ebay

[Dalo Harkin]

If you scan the car with Vagcom the N75 should throw a code if its faulty, chatter would normally be something other than the N75

[LittleReDuck]

As above the N75 controls boost levels so a faulty one would see boost spikes or odd boost delivery.

I would say its more likely the OEM recerc valve failing (Replace with a 007P/008P not a dump valve). Also check the piping to the recerc as my turbo stall was being caused by a blocked pipe preventing opperation.

[Wazzzer]

The latest revision OEM DV is also worth a look. Chatter means the DV is not putting the air back into the intake so could mean a split vac pipe to it or a fault with the DV itself

[iggyrs]

doesnt feel like a boost problem, im getting a 007p tomorrow so will try that first and report back.

thanks for the quick replys