I bought a 2015 Q50 from an car auction and it possibly has water in the fuel tank (no sign of water in the engine). Car does start, but runs very rough, then stops. So my guess is water in the fuel line and/or tank..

How do I drain the tank? Do I have to drop it, or can i use a syphon? 2nd, can I access the tank and fuel pump through the back seat? And can I dry out the pump and filter and reuse it, or will I need a new pump?

Any tips or info anyone can provide would be greatly appreciated..

molonlabe wrote: ↑

Fri Nov 15, 2019 10:35 am

I bought a 2015 Q50 from an car auction and it possibly has water in the fuel tank (no sign of water in the engine). Car does start, but runs very rough, then stops. So my guess is water in the fuel line and/or tank..

How do I drain the tank? Do I have to drop it, or can i use a syphon? 2nd, can I access the tank and fuel pump through the back seat? And can I dry out the pump and filter and reuse it, or will I need a new pump?

Any tips or info anyone can provide would be greatly appreciated..

Follow the steps in the FSM

http://www.nicoclub.com/FSM/G37/Sedan/2013/FL.pdf

telcoman wrote: ↑

Sat Nov 16, 2019 12:09 pm

molonlabe wrote: ↑

Fri Nov 15, 2019 10:35 am

I bought a 2015 Q50 from an car auction and it possibly has water in the fuel tank (no sign of water in the engine). Car does start, but runs very rough, then stops. So my guess is water in the fuel line and/or tank..

How do I drain the tank? Do I have to drop it, or can i use a syphon? 2nd, can I access the tank and fuel pump through the back seat? And can I dry out the pump and filter and reuse it, or will I need a new pump?

Any tips or info anyone can provide would be greatly appreciated..

Follow the steps in the FSM

http://www.nicoclub.com/FSM/G37/Sedan/2013/FL.pdf

Thanks.. Between the service manual, some youtube videos, and some intuition, I took off the back bench, removed both the fuel pump and the sending unit. I used a syphon pump (walmart $8) to remove all the gas, and sure enough, there was a lot of water at the bottom..

cleaned out all the lines, put in new fuel with some marvel mystery oil, and she started right up.. rough for a couple minutes as the fuel rail was getting rid of the old tainted gas, but after a bit, it sounds like a Q50 with 49k miles should.