Fuel leak 99 Sub

[Nedregaard]

Hi guys,

Have a Chevy Suburban 99' 5.7 and when the engine running, it leaks fuel in the rear of the truck.
If I turn the ignition off its stops. So I believe its comes from the top of the fuel tank..
Any have experience that before? I have not taken the fuel tank down yet
Anyone knows what could be the reason?

Thanks for answers!

 

[c1500deathtrap]

nothing to do but drop the tank and see wtf is going on. or buy a borescope and peek over the top. you can get cheap ones that hook to a phone. https://www.amazon.com/Endoscope-Pa...ns&keywords=borescope+for+android+phone&psc=1

 

[someotherguy]

Any significant drop in fuel pressure would have that small block Vortec stalling out, so likely the leak is the return line loose at the sending unit. But as the man said you'll be dropping the tank to deal with it.. hopefully the nipple on the sender isn't broken.

Richard

 

[Nedregaard]

nothing to do but drop the tank and see wtf is going on. or buy a borescope and peek over the top. you can get cheap ones that hook to a phone. https://www.amazon.com/Endoscope-Pa...ns&keywords=borescope+for+android+phone&psc=1

Thanks man! It did the job! The leak was on the return line, getting a new one Friday!

Any significant drop in fuel pressure would have that small block Vortec stalling out, so likely the leak is the return line loose at the sending unit. But as the man said you'll be dropping the tank to deal with it.. hopefully the nipple on the sender isn't broken.

Richard

Thanks Richard! You where absolutely right, the engine did not stall and the leak where a leak in the end of the return line. Hopes it goes well in the shop Friday, fingers crossed

 

[RichLo]

How many miles are on that fuel pump? It might be worth getting a new one now if its around 200k

 

[Nedregaard]

How many miles are on that fuel pump? It might be worth getting a new one now if its around 200k

The truck just passed 107k miles and I believe the pump is from the factory to