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i just got done repairing the O-ring leak on my 91 Z34. putting ti back together, i noticed that theres a vacuum on the fuell rail for the return line. Where does this vacuum run to? does it run to the MAP sensor? Thanks in advance! Bill
there should be two lines. one is a steel line that runs to your tranny..... other is a plastic line that runs from your map sensor to the fuel regulator.
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