T6.1 Not starting, Injectors replaced

[Jogvan6.1]

Hello.
I have been trying to find answers, but sadly none of them have been the answer my car is looking for.
After having had contaminated diesel in my car (water/bottom residue from an old tank), the car suddenly stopped running while driving.
The car has not started again since.
I flushed the tank and fuel system, filled it up with new diesel, replaced the injectors (New oem) and the filter, but no luck. The car started for a short period after the injectors were replaced, but then it turned back off.
The transferpump is work and there seems to be pressure on the system according to vcds. Tried bleeding out the system via vcds and manually bleeding out the system on the injectors.
Will run (rough idle) on startgas.
No fault codes.
T6.1 2.0 Diesel, 2021. Engine code CXHA.

 

[Dellmassive]

whats the rail pressure when cranking? - via VCDS.

Start up fault

Really happy with the help so far - have never received any remotely useful input from the dealership. But in there defence they never observed it faulting first hand only my videos. VCDS has been fantastic so far - only my inexperience limiting it. Reading the comments on the time stamps does...

www.t6forum.com

@mmi is very good at reading block map data from VCDS.

here is my chart of HP rail pressure,







see @mmi guide here:

Start up fault

Hi again, I'm trying to record my van when in fault with my new VCDS. I think the attached might show the fault? The problem is the fault doesn't present every start up. Once when I was trying to record it the VCDS just displayed n/a in every column. I've ticked the boxes that delmassive...

www.t6forum.com

and here:

Won’t start [Resolved]

T6 204 diesel. Van was used on a long drive and then a trip to the shops. It was left 5 mins and then wouldn’t start. Turns over but doesn’t fire. no fault codes. There was a slight burning smell when I parked up and it looks as if the front egr pipe has a crack, rear one has already been...

www.t6forum.com

....

 

[Jogvan6.1]

The rail pressure is 350 bar when starting

 

[Sasquatch]

I'm not specifically familiar with these engines so may be way off course, but Google suggests the new injectors need coding to the engine...?

 

[Jogvan6.1]

Hey @Sasquatch, i have entered the numbers on the injectors via VCDS, so that should be ok

 

[jon1979]

Did you solve this problem? I also have a non start after replacing injectors and hpfp.

 

[Jogvan6.1]

This has sadly still not been solved. The car has not been running since early June 2024.

 

[jon1979]

Have you tried the below from another post. I had no rail pressure until trying this. I did manage to get mine going after replacing the fuel rail pressure regulator.

“A pump proof test worked in getting this running again

Removed the plug off the fuel pump pressure regulator as these pumps will give full pressure unplugged

I fed a constant 12v wire to the pressure regulator on the end of the rail to hold it closed. Now while monitoring rail pressure with the injectors connected I cranked it over.

The rail pressure shot up to 2000bar, I did this three times to make sure the injectors had a good burst of high pressure and then plugged pump back in and removed feed from rail regulator

It then started but was only running on cylinders 3 and 4. Took it for a 5 minute drive and sure enough the other two injectors came back to life and running as it was before.”

 

[flapper]

Injectors airlocked possibly, crack of injector pipes whilst cranking to make sure fuel getting to each injector . Try priming fuel pump and resetting metering adaptions

 

[Jogvan6.1]

This has all been done, sadly.
The car has gotten all parts in the fuel system replaced, and it is still just cranking, no start.
A terrible situation.