Anyone tried a different n75 valve on there cars

[Monkeymagic]

I know I have a genuine 1.8t one in a box that I bought for mine.. however in my experience they rarely fail.. have you cleared.the fault to ensure its not a ghost code??

[Mikes2]

I don't think you'll find this valve in the other cars you mention. It's a wgfv so you certainly won't find it on an ADR engine which is not a turbo engine. It can be tested using Vag Com / VCDS in the output tests. I've seen a broken wiring loom causing this fault - it sits behind the right side headlamp so easy to check.

[B5NUT]

Yes, cleared the codes and this one came back. I've got a 1.8T (AEB) n75 in front of me purchased it by mistake as the numbers between the two engines are the same it's jus the AEB version also has a letter on the end. The problem with the AEB valve is it has a newer 2 pin plug on it, and don't want to start cutting into the car harness for something that may not work. At least I know the ADR version uses the same plug.

[newsh]

Quick test for the valve, engine at idle reach down behind headlight and place fingers on valve, quickly give throttle a big blip, you should feel the valve clicking.
When I got my first coupe back in ‘02? the valve was partly unplugged, was a nice surprise when properly plugged in.

[Mikes2]

034 133 517 ? That's a carbon canister N80 valve. Not the part being referred to here.

[Monkeymagic]

As stated above an output test will see if the valve is clicking away..on my mates ABY it was down to crudded up earth or the connection to the oil pressure sender I can't remember exactly

[newsh]

N75 is 034906283 I think

[B5NUT]

I don't think you'll find this valve in the other cars you mention. It's a wgfv so you certainly won't find it on an ADR engine which is not a turbo engine. It can be tested using Vag Com / VCDS in the output tests. I've seen a broken wiring loom causing this fault - it sits behind the right side headlamp so easy to check.

Your right. I'm looking at the wrong valve, it's this part number 034906283K

[andyg plym]

Had a few issues with mine recently where it was sticking causing problems tried a cheap Chinese £10 special and a waste of time. In the end got a genuine new one from a forum member but did find Quattro corner also sells them

[Tractor Dave]

I think Bertman had a couple for sale recently

[B5NUT]

So I now know why I'm getting the error code. It's not plugged in..

N75.jpg

Found the cable pushed into the headlight behind the black cover.

N75cable.jpg

So why the hell would you unplug the valve unless it faulty?

[Mikes2]

If the car has ever been to superchips, it was common to see this disconnected

[B5NUT]

What will that achieve on the S2 more power? From the few sites I've read about unplugging the n75 valve it will limit the boost but could help if you have a vacuum leak.

[B5NUT]

So I've not tested the N75 yet but not sure there is much point. As shown in the picture below there is a crack in the housing, and it's not holding air or vacuum, so I guess it replacement time.

Also connecting the plug to the N75 valve clears the fault code, so I know it's not a wiring fault, there must be vacuum leaks in the system or it's just at the point below.

n75 leak.jpg

[B5NUT]

If the car has ever been to superchips, it was common to see this disconnected

I called superchips but they could not help. The company went bust last year, and they have been bought out. The new owners have dropped all of there franchise and they now only have records of remaps for the last 12 months. They also don't remap the S2 anymore.