Things that will fail on your AAN/ABY/ADU and strand you

[UrS4boy]

...Timing did not seem to have slipped, and luckily I found a piece of copper wire. Disconnect the hall sender connector, put the missus behind the steering wheel and ask her to crank the car. Meanwhile doing rhythmic tapping between pin 2 & 3 on hall sender connector...

Any particular rhythm? 3/4? 4/4? or Dave Brubeck 5/4?

That is a good trick (if you have two people involved).

[prj]

Haha, just random...

You have a 50% chance of starting the engine and 50% of having it in the wrong phase and letting out a very loud bang from your exhaust.

Then you can just try again until you get lucky and hit the right phase

[veneto rs2]

Just for the records, this will not get you stuck but it's annoying to say the least.

Change my Hall sender checked for errors and everything was fine, but I was getting poor start, erratic idle (particularly with AC on) that woom woom and the revs needle uop and down gently from 700 to 900 which then stabilize, I could see dark smoke on start up in my side mirror, and above all an absolutely ludicrous consumption of average 18.7 L/100km even if I drove with an egg under my left foot.
Open the hood and with the engine not running nor key switched on I discconect the MAF connector and played a couple of times in n out with the sprinfg pressed and....
Presto I'm back to normal behaviour and turned to 12.1 L/100km

[UrS4boy]

...Open the hood and with the engine not running nor key switched on I discconect the MAF connector and played a couple of times in n out with the sprinfg pressed and....Presto I'm back to normal behaviour and turned to 12.1 L/100km

I know prj's no.1 thing to check when running rough is boost leak but more and more I think the first thing to check is the MAF connector or the MAF itself. I have flagged this in my G70 MAF post:

http://forums.quattroworld.com/s4s6/msgs/20442.phtml