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2 ways if you can see the screws to the top remove them and grab the top of the injector carefully with some padded pliers rotate side to side and CAREFULLY Pull out. replace the o-rings and install. or remove plenum or grind areas around plenum that are blocking but keep in mind the thickness of the aluminum good luck

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Q: How do you change fuel injectors on 1990 300zx twin turbo?
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