If you put new nozzles in your injectors, you're basically rebuilding them if you get the shims, pop pressure and spray pattern right.

You have to check the spray pattern and pop pressure before reinstalling- if not, your problem might be worse than before.

It would be cheap to bring them all to a shop and have them checked, that way you know the offending injectors. An alternate (and imprecise) way to check them is to loosen your injector hard lines one at a time and check the effect on idle that way.

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