One of the real problems is finding a vendor that will sell matched sets of injectors that are balanced at low pulse-widths. With 950cc/min - 1600cc/min idle pulse widths are very short, and many injectors that are perfectly balanced at 80% - 100% duty cycles are horribly mismatched at 1%.
If you have separate EGTs per runner and an engine management system that can balance injector dead time per cylinder you can tune this out, but for most of us it is a royal pain.
These cleaning services (I've used some before) will fix up the 100% duty cycle flow, but can't do anything to fix the dead-time issues. In fact the sheet shown in the review above only shows static flow.
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2.4L 6bolt 1997 DSM
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