Fuel sender snags, well, I think so, any experts?
Fuel sender snags, well, I think so, any experts?
Author
Discussion

silverback mike

Original Poster:

11,292 posts

279 months

Friday 21st October 2011
quotequote all
Chaps,

My fuel gauge has stopped working. I'm assuming it's the sender gone squiffy.

I've checked the search tool on here and seemingly it may be a wire off.

Does anyone have any knowledge of how to deal with this problem.

Thanks in advance,

Mike.

TheEnd

15,370 posts

214 months

Friday 21st October 2011
quotequote all
E36?
There is a poorly soldered wire underneath the pump/sender side (behind the driver).

That is pretty common for it to break loose.

4rephill

5,153 posts

204 months

Friday 21st October 2011
quotequote all
TheEnd said:
E36?
There is a poorly soldered wire underneath the pump/sender side (behind the driver).

That is pretty common for it to break loose.
+1 yes

By coincidence, guess what I'm doing tomorrow morning! rolleyes

silverback mike

Original Poster:

11,292 posts

279 months

Friday 21st October 2011
quotequote all
How do you do it chap? Please post instructions thumbup

TheEnd

15,370 posts

214 months

Saturday 22nd October 2011
quotequote all
Pull up the rear seat by grabbing the front edge and yanking hard, and then get it out of the car.
Under, you'll see 2 flaps in the soundproofing and a black metal cover plate with 4 screws.
Undo the one behind the driver's seat, and you'll see the pump / sender with 2 electrical plugs, and either one or two hoses.
If you have just one plug, you are on the wrong one.

Pull off both plugs (bigger wires is the pump, thin wires are for the sender) and start the car and run it til it stalls. This will depressurise the fuel system, and cut down on leaks, but still have a rag handy as there were be some petrol squirting about.
Undo the hose clips, and use a screwdriver like a chisel and unscrew the locking ring thingy.

Once done, you can pull out the complete sender and pump, and just underneath, you'll see the loose wire.

Whilst you are digging in, you might as well just check the wires from the pump before disconnecting anything, as they can sometimes chafe or crack under the seat base.

4rephill

5,153 posts

204 months

Saturday 22nd October 2011
quotequote all
TheEnd said:
Undo the hose clips
This is the hardest part of the whole job! Mine now has a jubilee clip on it supplied to Me by BMW (note that I didn't have to buy it so I don't have a part number but it's just a standard small jubilee clip).

Make sure you don't bend the float arm as this will give a false reading of the fuel level in the tank (and the float takes a bit of jiggling to get it out of the tank!)

One other thing to note is that the interior of the car will stink of petrol for a couple of weeks but it will eventually disappear.

TheEnd

15,370 posts

214 months

Saturday 22nd October 2011
quotequote all
I have managed to reuse those crimped BMW connectors if someone gets stuck, use a screw driver to widen the _n_ shaped part and it'll unclip, and to clamp it up, pinch the bottom with sidecutters or nips.

If you have a jubilee that's great, but if you are stuck without one, it'll get you out of a fix.

4rephill

5,153 posts

204 months

Saturday 22nd October 2011
quotequote all
TheEnd said:
I have managed to reuse those crimped BMW connectors if someone gets stuck, use a screw driver to widen the _n_ shaped part and it'll unclip, and to clamp it up, pinch the bottom with sidecutters or nips.

If you have a jubilee that's great, but if you are stuck without one, it'll get you out of a fix.
It's not so much reusing them, it's getting the bloody things off in the first place!.

The problem is that the factory crimps do their job a bit too well! (I nearly pushed a screwdriver through My hand trying to get the bloody thing loose so I went to BMW and asked what they do. Result?: They came back to Me saying: "Carefully cut it off and replace it with this" wink , at which point they handed Me the jubilee clip smile )