LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

On the fuel rails, which connector is for the feed line and which is the return line

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Old 07-29-2003, 03:29 PM
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On the fuel rails, which connector is for the feed line and which is the return line

Where the fuel lines connect to the fuel rails, there is two connectors. One is vertical and the other is horizontal, which one is for the input line and which is for the fuel return line ?
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Old 07-29-2003, 03:59 PM
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Vertical and horizontal? Mine are kinda side by side. 3/8" feed line (front) and 5/16" return line (off the end of the regulator).
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Old 07-29-2003, 04:04 PM
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Thats strange that mine is different ... One of the connectors is about a inch and a half further towards the back , and it is vertical. The closer ( To the front ) connector is horizontal
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Old 07-30-2003, 07:42 AM
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On the fuel rail, the bigger (3/8") line is for the feed and the smaller (5/16") line is for the return.

take care,
simon
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Old 07-30-2003, 12:32 PM
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Back of Intake.

The larger diameter line is the fuel supply line, and goes into the back of the passenger side rail. It has the Schrader valve on it. The slightly smaller diameter line is the fuel return, and it attaches to the fuel pressure regulator, which in turn mounts on the end of the drivers side rail.

Exaclty which lines are you talking about, with regard to vertical and horizontal?
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Old 07-30-2003, 10:27 PM
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The actual post that the fuel line connects too. One of the posts is horizontal, while the other is vertical.
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