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Old 05-09-2014, 11:04 AM   #2
1981Stepside
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Join Date: Jan 2011
Location: Port Coquitlam, BC
Posts: 202
Re: Fuel Line Help

OK - so for anyone else who experiences this problem - I've confirmed on a new 3 port FI sending unit that the 5/16 line is used for the fuel return and the 1/4 is the vent. Strange that GM would switch the two lines when the transition was made from carb to FI but, there it is.
Now to drop both my fuel tanks to re-plumb.
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