The proper way to clean injectors is to send them to a reputable diesel fuel specialty shop and have them cleaned and calibrated to specs. There are several different brands of vibra-sonic cleaners available to do the job but, without proper calibration equipment, the results may not be desireable.
Past experience has led me to advise, find a reputable Stanadyne dealer and have them done professionally. I say Stanadyne because they specialize in the pumps and injectors for our engines.
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