Author Topic: Whining fuel pump? (Read 15051 times)

pr · « **Reply #20 on:** August 07, 2016, 11:18:35 »

I see, thanks. I managed to get it out.

New problem. One of the allen bolts of the fairing is completely worn out

With some black magic managed to get it out. Definitely not getting that one in anymore.

What's the best place to get some new bolts? Does halfords sell that? I have a dealer nearby, but their workshop is closed on a Sunday.
Or are there maybe even complete sets of screws for a Wee that you can buy and keep as a back up?

pr · « **Reply #21 on:** August 07, 2016, 11:28:33 »

And another question:
If I pull off the fuel line after lifting the tank, will the fuel pour out or is it blocked by the fuel pump? If I do the quick flow test I need enough fuel in the tank (it's now at least 3/4 full)

MartinW · « **Reply #22 on:** August 07, 2016, 11:44:11 »

You can get the screws from Robinsons Foundry in Kent (with forum discount too).

The fuel will not pour out if you pull the connector apart.

pr · « **Reply #23 on:** August 07, 2016, 12:48:41 »

Thanks Martin, will ask them.

So I did the (quick) fuel flow test. And as expected it's too low. I did 5 instead of 3 on/off cycles to get a better average and got a total of around 200ml, which is less than half of what to expect (according to the test should expect between 500 and 600ml).
I poured the fuel back in the tank and checked the inside. There are some small black spots. Not sure if it is rust. I think I'll try to siphon out some fuel from the bottom and check how clean it is.

pr · « **Reply #24 on:** August 07, 2016, 13:42:10 »

My £3 siphon pump turns out to be quite useless: nothing really came out. But the crap that stuck to the tubing inside the tank gives a little clue that it's probably rust in the tank that's the problem.
I'm going to find myself a better pump and try to get a better sample.

On a side note: does anyone have a tip for a good contact cleaner spray, or similar? Preferably something they sell at Halfords? I'm going to try and scrub out some plugs, while the fairing is off.

pr · « **Reply #25 on:** August 08, 2016, 20:23:44 »

I just had another look at the fuel and took out a Litre or so. As you can see in the picture there is some flaky stuff floating around in there. When I put it on a piece of paper it seemed to look like rust.
So probably I have rust in the tank. That explains why the problem of the clogged pump keeps on coming back..

What would be the best way forward? I guess I need to fix the tank first, and probably need to replace the HP filter or pump.
Any idea what a dealer would charge for this?

fear_factory84 · « **Reply #26 on:** August 09, 2016, 07:54:35 »

The filter costs usually around 40€, at least here in Italy and then you can buy some treatment kit for fixing the tank rust.
I used a Tankerite kit on my old vstrom 650 from 2006. There are some brands that provide this kind of treatments for the tank.

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Hondaman · « **Reply #27 on:** August 09, 2016, 11:12:32 »

Can't the pump filters just be cleaned?
I recently replaced the car's in tank pump as it had failed, stripping the old unit for a look see shows they are easy to disassemble.

I'm sure the basic pump itself will either work or not.

Fat Rat · « **Reply #28 on:** August 09, 2016, 14:08:34 »

The key components are the filter at the bottom of the assembly, the pattern part is around £8, the Motor is new and won't need replacing. The high pressure filter is a sealed unit and is c£100.

You have nothing to lose, I'd try the high pressure filter bypass mod referenced earlier in this thread.

greywolf · « **Reply #29 on:** August 09, 2016, 15:35:38 »

An added nice thing about moving the filter to the outside of the tank is it make future filter replacement much easier.

pr · « **Reply #30 on:** August 09, 2016, 22:30:40 »

I have thought about the filter mod. I'm a bit reluctant to drill into the housing, as there were also some stories that said it wasn't very successful.

When you say the filter at the bottom, that's the low pressure filter? Could it be that it's only that one that's clogged?

I still have to open the tank, take the pump out and look inside.
Does the hole need to be drilled into that sealed unit? In other words, if I mess up I need to replace that part?

greywolf · « **Reply #31 on:** August 09, 2016, 22:36:00 »

The low pressure screen is outside the pump at the bottom. It has large openings that block big stuff like flakes or rust but lets finer debris into the pump where it gets trapped by the finer high pressure filter. I have never seen a case of a pump problem being from the low pressure screen alone although they are sometimes part of the problem. If the screen needs to be replaced, it's very likely the hp filter is clogged too.

If you mess up the drilling, you'll need to replace the filter housing. You would have to replace that anyway if you didn't try the mod.

Fat Rat · « **Reply #32 on:** August 09, 2016, 23:22:05 »

How about a second hand unit? http://m.ebay.co.uk/itm/2006-reg-Suzuki-DL650-V-Strom-Electric-Fuel-Pump-1009494-/351787504124?hash=item51e82b51fc%3Ag%3Av-AAAOSwtnpXjim7&_trkparms=pageci%253A7dbbdd46-5e7f-11e6-b8e8-005056bb7e3e%257Cparentrq%253A71649d1b1560a793c14494ddfff4ed1d%257Ciid%253A1

pr · « **Reply #33 on:** August 10, 2016, 07:19:37 »

I was considering that too. But don't I need at least a 2007 unit? Found this one http://m.ebay.co.uk/itm/311671390138
But I need to know the mileage in it.

And saw this one, but that already had 50K miles
http://m.ebay.co.uk/itm/Suzuki-DL650-K9-V-Strom-ABS-2010-2007-2011-Fuel-Pump-Petrol-VGC-49-/222180273471

They look different from the 2006 type. Would they fit?

Fat Rat · « **Reply #34 on:** August 10, 2016, 08:01:58 »

Check the part number on a site like Robinsons Foundry, you will probably find the pump assembly remains unchanged for as long as the tank stays the same shape.

If you fix the Root cause (rust/sediment in the tank) then a secondhand unit should be fine. You could always experiment with your unit for the bypass mod once you have a replacement.

pr · « **Reply #35 on:** August 10, 2016, 21:19:18 »

OK, I ordered the pump assembly and a fuel hose. I'll keep you updated

Fat Rat · « **Reply #36 on:** August 10, 2016, 23:02:32 »

Good luck, get that tank treated

pr · « **Reply #37 on:** August 11, 2016, 06:40:25 »

Yes, need to call a shop to see if it's worth to have it done or buy some por15 myself

pr · « **Reply #38 on:** August 15, 2016, 15:52:05 »

I received the fuel pump and took the tank of to inspect the inside.

The 5 bolts of the fuel pump are pretty tight. According to the service manual they should have some loctite stuff in the thread. How hard can you force it without damaging anything?

I don't have a torque wrench yet, but I'll order one to put it back together.

Also, the 99000-32050: THREAD LOCK “1342” from Suzuki, is that the same as this one?

Fat Rat · « **Reply #39 on:** August 15, 2016, 16:02:49 »

I didn't add any loctite to them the last time they were put back. Put some effort into it