What is the black odd box shaped box for which sits under the engine cover? Mines is just kinda chillin there....
Black box under engine cover
- Thread starter myfirstseat
- Start date
What engine/model you got bud? It's more than likely your n249 valve I believe and all the crap that it contains.
I think mine is flapping around in the wind, I'm sure it's supposed to have a fixing though. Its associated with the n249 valve, an ecu controlled valve for cutting boost if it needs to, it's like a safeguard against n75 failure as far as I understand. The chamber holds vacuum so the valve can open the dump valve when no vacuum is being created at the inlet. As far as I'm aware.
That's alright then, do you not have an engine cover? Im sure it shouldn't be doing any flapping?? I thought the LC's and LCR's had a fully recirculating valve?
Just get rid of it, its not required, the engine can still shut down the boost if it's overboosting without the N249. its supposed to be for that and for faster recirc valve response when you lift off the throttle but it doesn't work like that. Many people find boost is smoother and more consistent if they bypass or delete the N249 and the chamber. What you can do is remove the chamber and blank the pipes going to it, then plumb the recirc valve into a different vacuum source (fuel pressure regulator usually). You can also do a full delete of the valve and pipework too but that's a little more complicated mechanically, plenty of guides on here and other VAG sites though.
Thanks for the advice. Where is the fuel pressure regulator? Do you have a picture, i dont know much about this under bonnet stuff so im trying to pick stuff up as i go along.
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