Loud Fuel Pump, and Extra Ground Plug

[benpineapple]

Hello,

Had a bad fuel pump earlier this winter, which ended up being just a bad wiring issue, +POS wire to the fuel pump had failed at the point where the wire passes through the fuel sending unit. I drilled a hole in the unit, ran new wires through, and packed it with a JB Weld fuel tank repair product, and fuel-resistant Seal All product, to ensure a good seal. Anyways, developed a leak at that point after a month or so, couldn't fill the car past 12 gallons, and it always smelled like fuel on the outside.

I got sick of the issue, so I ordered a new sending unit from FCP Euro (Pro Parts 9470674). But...The unit has an extra ground plug.

Screen Shot 2017-03-19 at 4.33.40 PM.png (680.89 KiB) Viewed 2016 times

The is no receptacle for the white socket (kind of hard to see) on my V70. Everything else is identical, except for that. The wire is an auxiliary ground, it goes back from the fuel pump ground terminal. I figured it would be fine to just cap it, since everything is grounded already. But...Fuel pump is INSANELY loud, but goes down to a normal volume when I'm accelerating. It's really annoying, and I'm thinking perhaps it is spinning too fast at idle, perhaps because of this extra ground?

What do you think I should do? Ground the extra plug to the body? Leave it capped and hope the pump isn't overworking?

Buying an OEM fuel sending unit (~$450) is just not in the cards for me.

[j-dawg]

I got a Walbro 255 pump for <$100 from eeuroparts, and it came with everything to make it a plug-and-play replacement. Pretty popular pump with the muscle car crowd; it can actually support quite a high flow rate should one get bitten by the horsepower bug.

[tryingbe]

What do you think I should do? Ground the extra plug to the body? Leave it capped and hope the pump isn't overworking?

Buying an OEM fuel sending unit (~$450) is just not in the cards for me.

Just leave the plug and won't worry about it.

The fuel pump is always working at its max, the fuel regulator returns the un-use fuel back to the fuel tank. Some fuel pump is loud, some is quiet.

I love my DW200, 3 year no fault warranty, super quiet, much quieter than my walbro. You'd want the 9-201-0766 kit.
http://www.deatschwerks.com/products/fu ... 766-detail

[erikv11]

tryingbe, your posts keep making me wish things were broken on my cars, so I could fix them the way you have!

[wizechatmgr]

Nice to see an alternate source for pumps...

[benpineapple]

Hey all, thanks for the input. I drove my car around for a bit longer, to see if maybe it needed to "break in" or "warm up", noise never got better. And...Car developed a fuel-line leak on the driver's side, which has never been present before use of this pump. I think the pump was way higher flow/pressure than OEM spec.

I pulled the new sending unit, put my old aftermarket pump back in (which has been working GREAT for 6months), and put it all back together. Now I have to chase down a new fuel leak though...

FYI, DO NOT BUY THIS: https://www.fcpeuro.com/products/volvo- ... -9470674-1
Horrible quality, wrong pump, plastic connectors broke when plugging in.

[tryingbe]

Driver side...? The fuel hoses are routed on the passenger side. Only thing on the driver side are injectors and fuel rail. Maybe AWD is different?

[benpineapple]

Driver side...? The fuel hoses are routed on the passenger side. Only thing on the driver side are injectors and fuel rail. Maybe AWD is different?

Sorry I should have been more specific. New fuel line leak is on the driver's side of the fuel tank (so, pre-pressure regulator). On the AWD, there's a fuel level sending unit with 2 fuel lines in/out of it. Not sure how they're routed, but from what I could see, the leak is coming from the line that goes from the DS level unit to the top of the tank.