Hello all! My name is Sanel. I have a 2006 Audi A4 2.0T FWD. Sometimes when my car is in drive but at an idle like a stoplight or stopsign it will cut off then have problems cutting back on. Today it cut off on me in my driveway when it idled for 10-20 minutes and it hasn't cut back on at all. It is cranking just fine but it won't start. Sometimes it starts and cuts right back off.

I have replaced the fuel pump because it needed replacing and the crank sensor already. Im not sure why I am having this problem but it is getting serious. Someone please help if you don't mind. Thank you!

 

coil pack been replaced anytime recently? Did it throw a check engine light?

 

I have all new coils and plugs (bosch). My best guess would be the Fuel Pressure Regulator.

 

If it is the regulator or one of the other parts in the low fuel pressure system, it may be covered under an extended warranty from Audi of America (I got a letter a while back).

Even without a MIL, it may have a code stored. Mine keeps throwing P0089 and everything I can find online seems to point to either a reflash to correct a bad threshold in the computer for low fuel pressure or one of a number of parts in the low fuel pressure system (including the regulator). I keep clearing and scanning mine because I'm trying to baby it to get past the local emissions testing (has to be clear of codes to pass), but I find that the code appears long before the MIL in the dash and often, it goes off on its own after a while, too.

The big difference between your problem and mine is, mine is still running almost perfectly other than the code and it occasionally is a little cranky to start (but it always starts). One time, it caused a misfire and ran like crap, but the next time I started it after that, it was fine.