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Had fuel leak out of fuel lines off fuel pump. Replaced both…

Customer Question
Had fuel leak out...

Had fuel leak out of fuel lines off fuel pump. Replaced both lines and now don't want to run only idling and running ruff.

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

2010 mack gu813 mp7

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

What would happen if I put fuel lines on backwards on fuel pump?

Submitted: 2 months ago.Category: Medium and Heavy Trucks
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Answered in 7 hours by:
5/29/2018
Technician: Curtis B., Technician replied 2 months ago
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 31,847
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.
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Welcome to JUST ANSWER heavy equipment. With years of experience, I look forward to doing my best to help.

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Technician: Curtis B., Technician replied 2 months ago

If hoses are backward, the pump will not pull fuel from the tank, It has a suction side and a discharge side. Pull the hoses and feel the ports on the pump as the engine is cranked, one will be suction, and that has to be the hose from tank/filter, the other will be pressure and goes toward injection pump.

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