Help!

[a25c]

Took off from lights wot,backed off after 200 yards and pulled into inside lane and then noticed the rev counter needle dropping to the bottom and ign lights come on.

Car will not start so checked all the fuses at the drivers door,checked fuses under the bonnet and pulled all the relays in there aswell.

I have vcds and what's strange is it can't connect to the engine module,all the other modules connect and there are no faults...

Fuel pump?

[Error404]

Back to basics, have you checked that you have fuel and spark?

[DJones]

Not sure on why it won't connect to vag com but I would check that a air hose hasn't blown off following your wot pull.

Darren.

[Monkeymagic]

i agree with Alex check for fuel and spark first. does it crank over!

[Pirvu Eugen]

ecu fuses? check those too!

[a25c]

Back to basics, have you checked that you have fuel and spark?

I opened the nut at the fuel filter and pulled out the pipe and no fuel on ignition lights or cranking,not sure how to check for spark....

[a25c]

i agree with Alex check for fuel and spark first. does it crank over!

yes it cranks over..

[a25c]

ecu fuses? check those too!

where might they be?

[UrS4boy]

where might they be?

You need to sit down read this and follow all the hyperlinks it contains:

http://forums.quattroworld.com/s4s6/msgs/210191.phtml

ECU fuse, etc. is above the ECU:

http://forums.quattroworld.com/s4s6/msgs/137287.phtml

[a25c]

You need to sit down read this and follow all the hyperlinks it contains:

http://forums.quattroworld.com/s4s6/msgs/210191.phtml

ECU fuse, etc. is above the ECU:

http://forums.quattroworld.com/s4s6/msgs/137287.phtml

I got the car recovered and its heading to Autowerks in Cork before I got to do anymore so I will update this when I know more..

Thanks to all who replied...

Robbie.

[Error404]

I opened the nut at the fuel filter and pulled out the pipe and no fuel on ignition lights or cranking,not sure how to check for spark....

Then you have no fuel pressure. Maybe the fuel pump has died a death, or you have an electrical problem that is preventing the pump running.

[AndyP]

Take the panel out of the boot floor to expose the fuel pump access panel, then get somebody to crank the engine whilst you have your head in the boot, you should hear the pump kick in. Sounds like it's dead though.

Also check the G28 engine speed sensor, the ECU will not start the pump unless it see's 25rpm from this sensor.

Paul's thread helped me last week when mine wouldn't start.

http://www.s2forum.com/forum/showthread.php?t=49771&highlight=start

[benntenn67]

Timing belt ??

[UrS4boy]

...Also check the G28 engine speed sensor, the ECU will not start the pump unless it see's 25rpm from this sensor. Paul's thread helped me last week when mine wouldn't start. http://www.s2forum.com/forum/showthr...ighlight=start

A25c: Be aware that the G28 engine speed will throw an error code (2111 (Blink Fault Code), 00513 VAG1551/2) if the engine isn't running when the VAG1551 (or VAG-Com) is used. This is a false code. All non-running AANs, ABYs and ADUs will throw that. The G28 is likely fine. And the RPM requirement is as low as 13 RPM:

http://forums.quattroworld.com/s4s6/msgs/20986.phtml

Andy: I used Paul N's engine non-starting post as a basis for my more UrS4/S6 AAN-specific "Potential solutions to why your AAN-powered UrS isn't starting" post that I linked previously in this thread:

http://forums.quattroworld.com/s4s6/msgs/210191.phtml

A25c: You might want to investigate the info in this diagram (all the labels are hyperlinks, just click on them, e.g. G6 Fuel Pump in the upper left corner)

http://members.shaw.ca/speedtek/UrS%20Engine%20Bay%20Device%20Map.html

[UrS4boy]

Timing belt ??

Yikes. That would do it and cranking to try and start the engine would just bend the valves (more). Typically 2 intake valves, potentially more.