Audi 2.0 TDI PD poor first start

[deaudi]

Hello

I am posting here for the first time.

I hope somebody had the same problem in the past and can help me.

I have Audi A6 C6 2.0TDI PD
Every morning or when car has been stood for about 6 hours or more, it starts poorly. Sometimes it takes about 7-10sec to start. After that, for example I start my car for the second time, it starts perfectly. Any ideas what can cause this problem?

What I have done so far:
New injectors
New Tandem pump
New Coolant temp sensor
Fuel filter has been changed too.

Thanks for your answers

 

[KrisKrk]

Welcome on the forum.

Scan the car with VCDS as a first.
Second, measure the power on the battery, check if alternator charges the battery and gives enough juice.
You can also check visually if all fuel lines are fine to exclude potential clog inline that fuel pump might try pushing.

These should be your start points.

How long have this been happening for?

 

[deaudi]

I have my car scanned with VCDS but there are no fault codes.
My battery has been replaced 6 months ago.
The problem started long time ago but I usually thought that it is because of battery. During that time I have changed 2 battery, but no improvement.

Also anybody knows what readings should be in VCDS measuring blocks 004?
What's more, can anyone explain me what is Torsion value and Injection start? (I'm a lady and want to know more about VCDS )

Thanks!