I am having a problem with my car. Sometimes when I start it it will immediatly stall. So far I've changed all 4 coils and plugs and coolant temp sensor. I can't seem to find the cause any help would be great!

 

Could be a couple things, the symptoms could either be 1) Immobolizer (is there a key looking light that flashes on your dash? if so then something wrong with the immobolizer), or 2) Major boost leak somewhere, possible loose connection to ur bov. Try unplugging your maf (unplug the cable from the sensor), then try starting the car, if it starts and doesn't stall, you've got a boost leak.

 

I have a boost gauge and am not showing any boost leaks. When the car stalls the key does flash on the dash!

 

Did you see if there are any codes?

How many miles do you have because maybe a clogged fuel filter is choking your fuel flow.

 

If there is a key light flashing on your dash, and sometimes after your try a few times it'll eventually keep running, then something is wrong with your immobilizer. Take it to a reputable audi mechanic or the dealer to have to fix your immobilizer.

 

I unplugged my maf sensor cable and the car started and idled fine. Why does this suggest a boost leak?

 

Does it repeatedly stall out or just the first time when you try to start it?