I doing a swap for a friend and have problem with his electrical.

Any revs over 3g the car power died(electrical) ligth and everything turn off
it iedals rought with the light on but better with them off.

It seem to run out of steam in 3rd complete boggage.

Running a6 ecu and a6 dizzy

replaced alternator

 

What code is it throwing?

 

check all the grounds to the motor/frame..

clean them all up...

battery could be shorting out too (across the hood)