IanManchester

am having poor running on my V8 A6, the faults from Vag com are below, when in drive it is very reluctant to accelerate hard, if slowly increasing speed there is no stuttering. Any pointers??? thanks in advance.


Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,08,15,16,17,35,36,37,45,55,56

Address 01 -------------------------------------------------------
Controller: 4D0 907 558 A
Component: 4.2L V8/5V G 0002
Coding: 05752
Shop #: WSC 00876
4 Faults Found:
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
17538 - Fuel Trim: Bank 2 (Mult): System too Lean
P1130 - 35-00 - -
17549 - Load Calculation Cross Check: Implausible Value
P1141 - 35-10 - - - Intermittent
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - - Intermittent
Readiness: 0000 0000

I have been told else where on the site that i need to check my vacuum lines - what is this and how/where do i check them? thanks

audikillsbmw

crumbling. Wasn't hard at all. Just do them one at a time, and you'll be fine.

IanManchester

please can you show me a picture of this diagram, I have been looking everywhere on the net.

Many thanks.

audikillsbmw

To be honest though, you shouldn't need to use that diagram. Once you remove the plastic cover from the engine, you should be able to see 90% of the vacuum lines. The only lines that can be difficult to see are the ones that go to the reservoir on the drivers side, and the ones that go back to the combi valves behind the heads.

IanManchester

i must be blind - because i am not seeing the sticker under the hood, also when i removed the plastic engine conver I would not find the vacuum lines. can you take a picture and post it? thanks

Mister Bally

Photos show a somewhat closeup of the sticker on the hood as well as the whole hood. Note sticker on lower left of open hood as viewed from the front of the car.

Mine is a 2004 A8L with 4.2L engine. I don't know how different your car may be.

I hope this helps you.

<img src="http://pictureposter.audiworld.com/102428/100_3954.jpg">

<img src="http://pictureposter.audiworld.com/102428/100_3956.jpg">

audikillsbmw

The stock vacuum lines are cloth covered. They should be easy to find.

audikillsbmw

Ours is located above the brake fluid reservoir.

IanManchester

Interesting - I dont have one of those... possibly my hood has been changed at some point?? - although i dont believe the car has been in an accident (its a UK model if that matters)

The car is currently at a VW/Audi specialist, they say although the diagnostics are not saying the MAF is stuffed they think that could be the problem - a new part is arriving tomorrow, hopefully this will fix the issue.

They say they checked the Vacuum lines (I said thats where the fault could be) and they say they cant find any problem with them.

I shall keep you all posted - thanks Audikillsbmw - your the only person who has been able to assist with this. :-)

kaynos

Please post your results. I have the same errors on my car. Vacuum lines have all been replaced..