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Here you go ................... http://www.audizine.com/forum/showthrea ... olant-loss

It will be your PCV Valve
It's under the supercharger, it's plastic!

Check this recent victim of massive buildup.

http://forums.quattroworld.com/rs4b7/msgs/52391.phtml

I notice Audi paid for this one under warranty

Take a look here....... http://www.audiworld.com/tech/wheel28.shtml

Front & Rear

Probably the Fan Control Module, located under left-hand chassis rail at the very front of the car. Common faulty part. Replacement is upgraded. around £140 IIRC.

Mine has been perfect since I changed it a few years back.

As S2tuner said.............. I had this. Check the switch above the clutch pedal is adjusted correctly to actuate when the clutch is fully UP. It opens a small valve. This can be noticed on the boost gauge at idle (if you have one) or logged on VAG-COM. There is a channel which checks the operation...

Try These guys
http://stores.shop.ebay.co.uk/Dsgwagen- ... ccessories

Got mine from them year or so ago, best price.
Non-Genuine discs are not available as far as I know.
Note: They are handed Left and Right

Coolant Temp Sensor ?
(tells ECU engine is cold all the time so overfuels)

N/S Rear is common - Have replaced both mine although O/S was OK. O/S gets less road cr@p on it as N/S is running in the gutter UK. Parts are cheap.

Can be done on the car with the SIR B90 Bearing puller tool.

Vid here........ http://tychl.txf.com/SIR-B90/2%20minute ... 0-xvid.avi

It's No. 4 on this diagram..........

ogg14 wrote: Its coming up in Vag Com that this might be at fault (running lean on both banks)

Sure it's not the MAF?
Very Common fault and shows as lean on both banks.

mikeyquattro wrote:you want to go up to 15psi

Correct - The TBB (Throttle Body Boot) is a very common leak point and only opens up at near 1 bar.

Also, a leaking or stuck diverter valve will not show up on a pressure test as both sides are pressured on this type of test.

Interesting, it may help with the inlet coking problem!!

That's why you remove the oil filler-cap to stop the hissing noise due to build-up of pressure in the crankcase returning through the breather pipes. It's normal, caused by the blow-by of the piston-rings etc into the crankcase. That's what breathing is all about, returning to the inlet system to be...

Its so obviously a missed gear and rev limiter??? Sorry, but no! 900Bhp highly modified, has launch control and traction control (same as MotoGP bikes and F1 last year). Think it's got sequential gearbox too, changes gear faster than you can blink. Popping and banging at start is anti-lag to give b...