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hi guys

having an issue with my number 4 injector, running on the mirco ecu. pin 42 isn't sending signal to the injector to spray. Is there something on the board of the ecu i should be looking at? i've swapped plugs around and injectors and all 4 injectors work fine. This injector was working before,

All four injectors are driven by same TLE8888 fancy automotive chip on microRusEFI https://www.infineon.com/cms/en/product/power/automotive-conventional-powertrain-ics/engine-management-ic/tle8888-1qk/

please do a visual inspection of both sides of the board but that specific part is supposed to be one of the most resilient pieces on the whole unit.