fault codes

[Mattyb]

hey all i am having a few problems with my a8 lately,

it some times cuts out and today i had a new problem where the engine is reving up and down from about 800rpm to about 1200.

i cleared my fault codes a few days ago and have done another scan today and this is what iv got,

any help will be appreciated as im new to world of vag.

Saturday,20,April,2013,13:33:45:41965
VCDS Version: Release 11.11.5

Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 4E0 910 401 J HW: 4E0 907 401 B
Component and/or Version: 3.0L V6TDI G000AG 0020
Software Coding: 0011973
Work Shop Code: WSC 02313 785 00200
VCID: 224B3171FD6C1C08178
3 Faults Found:

17984 - Right Engine Mount Solenoid Valve (N145)
P1576 - 001 - Short to Ground
Freeze Frame:
RPM: 0 /min
Torque: 214.5 Nm
Speed: 0.0 km/h
Voltage: 11.93 V
Bin. Bits: 1
Bin. Bits: 1
Bin. Bits: 1
Temperature: 18.9°C

18279 - Transmission Mount Valve 2 (N263)
P1871 - 001 - Short to Plus
Freeze Frame:
RPM: 0 /min
Torque: 214.5 Nm
Speed: 0.0 km/h
Voltage: 11.93 V
Bin. Bits: 1
Bin. Bits: 1
Bin. Bits: 1
Temperature: 18.9°C

19591 - Intake Manifold Runner Control
P3135 - 001 - Lower Stop not Reached
Freeze Frame:
RPM: 1092 /min
Torque: 132.6 Nm
Speed: 2.2 km/h
Voltage: 13.68 V
Duty Cycle: 88.8 %
Duty Cycle: 80.9 %
Duty Cycle: 80.9 %
Temperature: 74.7°C


Readiness: 0 0 0 0 0

im not to worried about the top 2 at the minute unless they could cause my problem, but i think this is unlikely

its bottom code (intake manifold runner control, lower stop not reached) that i believe is the problem.

thanks for reading

matty

[limoncello]

your right the top 2 are no problem, it must be the 3rd

[Mattyb]

Any one have an idea what i can do to fix it, i dont even know if it is a part i can replace,

Iv not gt a clue about audis

[Architex_mA8tey]

I think on that last code which relates to the intake manifold - sounds like its the actuator that is giving problems due to wear on the flap valve (this is made from plastic and needs to be replaced as a unit otherwise you're going to have isssues with recalibrating the servo motor on the flap unit. Talk to A8 parts and see if they have one I guess.

[Mattyb]

Thanks again architex, iv seen some on ebay that claim to be rebuild using stringer parts around 350 for a pair of manifolds.

I think im just going to change both of them, i dont want this problem in the future with the other manifold.

These ones here

http://www.ebay.co.uk/itm/COMPLETE-I...item4ab9e4440c

Iv been looking about and i have found that audi do a repair kit for less than 20 pound a side. Although it doesnt replace the bearings it does repkace the linkage.

Im going to try this first, so i will report back once iv fitted them.