Guys,
A quick way to isolate a nailing cylinder or faulty injector is to lossen each injection line at the injector one at a time while the engine is running. Each time the engine speed should decrease by a similar amount. If one make less of a difference or the nailing stops you've got the bad one. Remove and clean that injector.

I've got the Bosch test unit on my bench at home, what I need is a supply of the shims to set pop off pressure. Anyone who comes up with a fist full gets a set of nozzles cleaned and balanced for free!

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Bob D.
Parrish, FL
1 SDL, 1 D, 1 TD, 1 Mog