goldenboydxb

it is my first thread here, so i don't know what to say,, am Nasir from Abu Dhabi. I own Audi s8 d3 and i really like it,, even if Audi's reputation is very bad in our region and it is because of the dealership. anyway, in the past month i faced an issue with my s8 and it is that, when i start the engine and i keep the car parked for a long time(+30 min) the car's engine will stop and if i started it again it will keep cranking and then it will stop again,,,,, i just want to know if anyone of u faced the same issue and how he fixed it......plz watch these two videos which i recorded
https://www.dropbox.com/s/jzk34r135z...119_210818.mp4

https://www.dropbox.com/s/tqgw1dq62o...119_211009.mp4

i guess that it is either the air sensor or the fuel pumps

Jake Musser

Are you able to run Diagnostics with a Vag-com?

MN-A8

This sounds like the crank position sensor is failing. When these sensors get hot they start to fail causing extended cranks, failure to start, or rough idles after the car has warmed up. They seem to work perfectly fine when cold.

As Jake is suggesting, run a scan with vag-com, or get a scan done at the dealership. It should tell you the exact problem.

goldenboydxb

I took to grage to run a scan, today at fhe the morning they called me and they said that then scan showed 3 thing :
1) right air mass follow sensor
2) low fuel pressure
3) engine ecu

And he said that I need to changes the air sensor and the two fuel pumps...after that he will scan it again to see if the engine's ecu fault will appear again

BASARAB

I second crankshaft sensor

MN-A8

What tool did they use to scan? Those seem like pretty generic results. Only a dealer scan tool or vag-com would be able to read all the modules in the car and give the correct "P####" codes.

Does the car accelerate OK all the way to the higher RPMs? If so, fuel pressure isn't an issue. Although it probably wouldn't hurt to replace the fuel filter if its never been done.