RS6 cold start issues

[vtraudt]

Having a lot of cold start issues when it is very cold in the morning.

Will have low/rough idle on start up and cannot rev motor. Does this until motor starts to warm up, then must turn off car and turn back on. Will return to normal idle, can rev and drive normally.

This morning was a bit different in that the car started at low idle but lights began to dim/turn off until the car died. Points to alternator issue?
I jumped the car. Battery voltage meter on jumper pack showed 12.5V and as the car idled longer it rose to 13.8V.
At this point the car ran normally and I was able to drive to work.

Ideas?

[mr_dave]

Did you scan for any codes?

Also, take a look at these:

http://www.rs6.com/showthread.php/23...(5-deg-F-cold)

http://www.rs6.com/showthread.php/24...tart-no-brakes

http://www.rs6.com/showthread.php/21...on-sloppy-idle

[vtraudt]

Did you scan for any codes?

Note yet. Vagcom end of this week.
Thanks for the links.
I guess a leak test ('smoker') is called for if the vac system is considered a potential culprit.
I had the venture vac jet Y thing fail on other cars before. On the 2.7T and 1.8T I typically 'clean up' the evap/recirc monster and get rid of it.

[Korben007]

Note yet. Vagcom end of this week.
Thanks for the links.
I guess a leak test ('smoker') is called for if the vac system is considered a potential culprit.
I had the venture vac jet Y thing fail on other cars before. On the 2.7T and 1.8T I typically 'clean up' the evap/recirc monster and get rid of it.

The RS6 does not have the vac Y in the most convenient spot...

-Avantwerks Audi Customization Specialist