VW Golf Mk5 2005 TDI(BKD) rough idle when cold and cuts out

[fransnz]

Hi Guys


I had an issue with hard starting a month ago and decided to change the glow plugs after an error on the Vagcom and while doing that I cleaned the EGR valve.
Since cleaning the EGR and doing the glow plugs I have had an issue with rough idle when the motor is cold till reaching operating temperature.
There is what seems like a misfire at low speed when cold.
I decided to change the EGR and still no luck.


I've read that it could be the glow plug/injector harness but wanted to check before ordering one.
Hopefully you guys can give me some pointers.


Thank you
Frans

[Umai Naa!!]

You'll need to scan it, to get some sort of direction.

[fransnz]

Hi Umai Naa
I've scanned it over and over with no errors.

[Umai Naa!!]

If you've got VCDS, check the missfire log for each cylinder. That should narrow it down somewhat.

[fransnz]

I connected it up and there seems to be no missfire log for a diesel in the Vagcom. I tried selecting all the channels.
Have changed the fuel filter which has made it a little better.
Do you think it could be a temp sensor as the fan seems to come on before the car is even 1/4?

[The One]

I connected it up and there seems to be no missfire log for a diesel in the Vagcom. I tried selecting all the channels.
Have changed the fuel filter which has made it a little better.
Do you think it could be a temp sensor as the fan seems to come on before the car is even 1/4?

Was the fuel black? / dark?

[fransnz]

The fuel in the filter housing was black and the filter very dirty