Right, I think I may have been out with my original diagnosis!
The noise is not a clicking, it's like a whistle noise, but less high pitched than the turbo. I can hear both the turbo and this other whistle at the same time. To be honest, it sounds like a strong wind through the trees kind of whistle!!
It does not do it in 1st or 2nd gear.
It only does it between 2500 and 4000 revs (sound drops off after 4000), in 3rd and up.
It only does it if I floor it in 3rd or above with the revs around 2500 ie put the engine under a bit of load.
If I do a quick dash through all the gears there is no noise.
I reverted the map back to stock this morning, and I can't hear it at all.
Unfortunately I have no ftp access at work so I can't upload my log so here's a snippit:
260.22 3200 70.7 1020 1340
260.52 3200 75.9 1080 1340
260.83 3200 77.4 1130 1340
261.13 3240 78.9 1150 1350
261.43 3240 82 1150 1350
261.73 3240 89.5 1530 1340
262.03 3280 133.8 2400 1580
262.33 3320 178.9 2400 2070
262.64 3360 191.7 2410 2510
262.94 3400 191.7 2420 2510
263.24 3440 191.7 2430 2420
263.54 3480 191.7 2430 2450
263.84 3520 191.7 2440 2450
264.14 3560 191.7 2430 2440
264.45 3600 191.7 2430 2440
264.75 3640 191.7 2440 2440
265.05 3680 191.7 2430 2430
265.35 3720 191.7 2430 2450
265.65 3760 191.7 2430 2410
265.95 3800 191.7 2430 2440
266.26 3840 191.7 2430 2440
266.56 3880 191.7 2430 2430
266.86 3920 191.7 2430 2420
267.16 3920 191.7 2430 2420
267.46 3960 172.9 1980 2250
267.76 3960 130.8 1150 1730
268.07 3960 37.6 1000 1490
268.37 3920 13.5 1000 1240
268.67 3920 12.8 1000 1140
And here are my current fault codes:
VAG-COM Version: Release 311.2-N
Chassis Type: 8L - Audi A3/S3
Scan: 01,02,03,08,15,17,22,35,37,45,54,55,56
Address 01 -------------------------------------------------------
Controller: 8N0 906 018 J
Component: 1.8L R4/5VT 0003
Coding: 10710
Shop #: WSC 80177
WAUZZZ8L921001285 AUZ7Z0A1869437
1 Fault Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
Readiness: 0000 0000
Address 08 -------------------------------------------------------
Controller: 8L0 820 043 H
Component: A3 KLIMAAUTOMAT 0105
Coding: 00041
Shop #: WSC 01236
1 Fault Found:
00792 - A/C Pressure Switch (F129)
31-00 - Open or Short to Ground
Address 17 -------------------------------------------------------
Controller: 8L0 920 980 R
Component: KOMBI+WEGFAHRS. VDO D07
Coding: 01444
Shop #: WSC 00306
WAUZZZ8L921001285 AUZ7Z0A1869437
1 Fault Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
Address 22 -------------------------------------------------------
Controller: 02D 900 554 B
Component: HALDEX LSC ECC 0006
1 Fault Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
End -------------------------------------------------------
Sorry this is so long!!!!