How many ecu error messages. Help please?

[Nmidlane]

Hi all

Just had to get towed home as my RS4 B7 wouldn't start.

Problems has existed for about 2 months randomly either car won't start or is really lumpy.

Normally on restart is fine but this time it would not start no matter how many times I tried.

Audi have had it in and scratched their heads as has a local independent garage.

Thinking of getting an auto electrician to have a look as a lot seem to be low voltage errors.

Any ideas or anyone had anything similar. Screen shot of vagcom error codes from helpful AA blokes computer.

Cheers

Neil

[Madmonkee]

Vacuum leak may cause a few of them I'm guessing

[adsgreen]

Not vac leak.
Definitely electrical

[Nmidlane]

Thanks for replying. I was thinking along the lines of wire loom/connector shorting due to all the simultaneous circuit low errors. Which ones do you think would be related to the vacuum?

Cheers Neil

PS ignore AA RS4 2.7, in the pictures this is a B7 4.2 V8

[PetrolDave]

Worth checking the ECU earth connection too.

[Nmidlane]

Typical, got my multimeter out and started to check some of the wiring and this
Temperamental problem has gone away again she is starting fine and ecu error light on dash has gone out. Are there any diagrams showing where the ecu earth connection is etc?

Cheers for your replies.

[adsgreen]

also check main connectors to the ecu for water ingress.
esp if the problem is now going away

[AndrewRS4Avant]

I have similar, Audi printed me a book of errors, literally. Mostly intermittent. The bloke said it could be where water has got into the ECU connections.