Stock 370cc injectors (and Nismo 555cc) injectors are purple when new. With time and heat cycles they discolor and fade to that grey / tan color.Replacing 1 dead injector vs. all six wasn't really all that uncommon in the early 2000s.
Bernie Bilski berniebilski@cox.net President of Z-Car Club of Northern Virginia 1995 Nissan 300ZX TwinTurbo in Cobalt Green 1997 Nissan 240SX SE in Ultra Red 2006 Nissan Frontier SE in Ultra Black
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