I do not know what was responsible for the blockage, but it has happened regularly. You cannot get all the way into the nozzles. I took them apart but found nothing big. I do have the filter in place. I suspect it was some sort of scaling. I use only blue washer fluid. The vinegar helped.
I just ordered an FiA2, which should help me monitor the flow and can trigger a boost reduction. I have a knock sensor monitor installed as well, so I can see if the engine is pinging.
Philip Bradley
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