Hi, ive been dealing with this issue for about 6 months now only for it to get worse over the last couple months.

I have a 2014 s3 8v dsg and whenever i drive the car and let it get to normal operating temp after turning off the car and leaving for say 30 mins when i get back in to start the car it just has this limp attempt to start before shutting off and not being able to start.

The engine is cranking but does not start, i have to mash the throttle fully down to force the car to start and when it does it just stinks of fuel because the engine is being run too rich. 

Now i have replaced the following parts as they already needed doing and some were the usual suspects:

-Battery

-All 4 spark plugs

-all coil packs

- both mag cam sensors 

- evap purge valve

- all 4 injectors 

I will attach a video to show what happens as i try to start the vehicle. The car is on quarter tank but the problem occurs no matter how much fuel is in the tank as its done it on full tank to nearly empty. 

Once the vehicle starts however and i drive it around a bit the fuel smell goes away and the car runs as if nothing is wrong. When on idle it feels completely smooth and since the injectors were replaced it feels completely fine on power. Its just a case of when turning the car off after being warm for about 30-45 mins it just has a problem trying to start. 

No fault codes shown which is annoying and ive had the car taken to an audi specialist who plugged in the vcds software and was not seeing any faults. 

If anyone can give me any info on the ignition procedure on these EA888 gen3 engines and possibly the 8v S3 in particular id really appreciate it 

Did you get the new battery coded to the car? It's essential to do so.

Yes the battery was the first to be changed as the old one was not holding charge. Once the car has started it, it drives as if there isnt a problem whatsoever. When stopping at lights the idle seems perfect. Its only when the cars been driven a while then left to cool for 30 mins or so it does what it does in the video. It seems like a fuelling issue to me but im not getting any fault codes and nothing seems to be out of the ordinary 

Have you figured out what's wrong yet? My son has a 2015 A3 2.0t premium plus and he is have the exact same issue.

9 minutes ago, Matt E. said:

Have you figured out what's wrong yet? My son has a 2015 A3 2.0t premium plus and he is have the exact same issue.

Nope not yet ive got it at the garage now doing some fuel pressure tests and still waiting to hear back 

***update***

Just testing the fuel pressure after replacing the injectors and can see that fuel pressure is still low therefore im trying a new fuel return valve to see if this is the cause of the problem

Thanks for the update

**update** 

Replaced the high pressure fuel pump and seems to have fixed the issue. Only had the car with a new pump fitted for a day and so far so good

On 11/29/2024 at 3:18 PM, Sahil shariff said:

**update** 

Replaced the high pressure fuel pump and seems to have fixed the issue. Only had the car with a new pump fitted for a day and so far so good

Has the fuel pump replacement fixed the issue? I am having the same problem with my 2015 and spoke to the service, I was told that it is a common problem and on several cars even though they replaced the pump several times, they are still having this issue intermittently. Also, how many hours was the labor on the fuel pump replacement?