T5 running ruff on start up

[matt13]

2005 1.9 T5, was running rough on starting but if driven for 10 min or more and turned off running smooth and ok.mech assumed running in 3 injectors and it was diesel injector problem. Injectors tested and no problems. Fault code showed bank one electrical fault. Taken to auto elec who said that no "pulse" to the injectors so had a look at the injector loom where he said it was dirty and some wires appeared loose. Cleaned and tightened.
On start up van running smooth unlike before but once driven anything under 2000 rpm in 2 3 or 4 gear van shudders. Once again if driven for 10 min or more and turned off van is running fine.
No one I've taken it to really has an idea of why.
Any ideas ???
Cheers

[REVHE4D]

Could be carbon buildup on the intake, I am no expert but did see a vid on youtube about thos problem with all Vws due to the recirculation of exaust gases.
I could be wrong. I am by no means a mechanic

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