I inherently agree with you but the original poster is a Volkswagen TDI and Touareg Tech and has confirmed via a balance test that they are outBefore getting all crazy replacing injectors why not have them tested?
If you have a Bosch authorized fuel injection service shop near you, they can run full diagnostic testing on them. I got some tested for another vehicle a few years back for something like $50.00 each.
Results came with a full report.
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