1.8 T GTI - High Pitch Noise on Start up

[x Silver x]

Thanks everyone - will take a look once its stopped raining

Can anyone describe where its located?

[BarryMKIV]

Remove this cover.



And it looks like this. You should see it straight away.

[golf-sib]

Can be pricey for a new one, some vags have a selenoid as well that sometimes fails.

All in all I've removed someones before and bypassed it with a resistor. Its purpose is only to turn on during startup to help warm the cat up. There's no harm in removing it, once removed you will get a light on dash, but a resistor will sort this.

[jockgti]

resistor doesn't stop light on dash or didn't with mine anyway

[Dalo Harkin]

resistor doesn't stop light on dash or didn't with mine anyway

should do thats the point of adding it in

[ENGWootton]

Exactly the same thing happens with mine (MK4 GTI T), noise usually lasts about 30/40 seconds and bang it's gone, unusual I thought at first but the person who owned it before me even said the same thing, he was a registered mechanic and had a look at a few things as it was his girlfriends car.

Ended up being nothing to do with the engine or the turbo and I asked whether he'd checked the secondary air pump/injector, which he hadn't done, going to get round to doing it at some point, however V-DUBS rarely need them nowadays.

I'm almost sure it is that and to be honest I'm not exactly the most experienced with cars.

[JimBR]

Someone's mine makes a pretty loud beep if there's no petrol in it 

That all the time then?

[ALBEEEEY]

Nah I like a mix of both petrol and diesel to lubricate the tank better

[Nino]

Im getting this problem with my car althou i dont get a sqeek noise mine just sound slike its running rough for about 40 sec then i hear a pssssssh the revs drop and the car sounds how it should lol am i guessing this is my secondary air thingy? also isit much of an issue? or can it be left while i sort other stuff?

[golf-sib]

Im getting this problem with my car althou i dont get a sqeek noise mine just sound slike its running rough for about 40 sec then i hear a pssssssh the revs drop and the car sounds how it should lol am i guessing this is my secondary air thingy? also isit much of an issue? or can it be left while i sort other stuff?

Can be left, like said it only turns on when engine is cold for a duration around 30-60seconds, to aid in pumping more air into the system to warm it up quicker.