I have a 2001 audi a6 2.8 quattro that will crank, but won't start. Tried jumping. Recently changed the starter and ignition switch. Fuel pump has power at pump, but is not activating when I turn the key. Power windows, roof, and ac/heater are not working, and when I turn the key, the guages do not move accordingly. Do you think it is just the fuel pump or some sort of electrical or fuse/relay issue?
Earlier in the day the car wouldn't turnover, but did with a second attempt and drove home with no problem
Previously the car had occasionally periodically turned over on ignition, then immediately die, but would fire back up and run & drive as expected.