Bought all new injectors and a tuner, took apart passenger side first, back to front, and the front injector I noticed a small dot of fluid (not oil) on the brass end, took a inspection light and looked into the hole and there is what appears to be coolant visibly seeping out of the cup, I opened this up like 6 months ago an I don't think it was like that, so I'm guessing my cup is cracked, for the actual question, kinda short on time and money, can I buy one cup or will I have to change them all? Also the coolant bottle has black residue inside it. The coolant itself looks good though.
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