Lb7 Fuel Return Line Diagram. This vehicle was in limp mode with low fuel pressure fault. 745390 fuel injection line routing diagram fuel system overview (1)fuel rail(2)fuel junction block(3)fuel.
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Pressurize the return circuit with the valve covers off and look for bubbles or vacuum test the return circuit. Web replacing lb7 duramax fuel filter head assembly on an 02 gmc sierra. We created this page to help those trying to find.
Web Injector Return Lines Are Under The Valve Cover On Lb7 Engines.
This vehicle was in limp mode with low fuel pressure fault. 745390 fuel injection line routing diagram fuel system overview (1)fuel rail(2)fuel junction block(3)fuel. The return lines are connected to the injectors with.
These Lines Often Will Crack Or Leak, And If You Are Servicing.
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