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Fuel pump issues solved - Ducati (and possibly others)

Discussion in 'Tech Help' started by Crabman, Jun 18, 2013.

  1. Crabman
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    Crabman Member

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    Was the bike running fine before and straight after the install? or did the service/PC seem to cause the problem?
     
    #21
  2. BeltandBevel
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    BeltandBevel Member

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    The cranks are tight (preload on the main bearings) in modern Ducatis. They do seem to stumble more than the older stuff, though stalling is not right at all. Its dangerous, especially if a car doesent expect it to happen whilst you're in an intersection.

    What does it idle at, RPM wise?

    Power commanders are just a bandaid for fuel, and in most cases arent that neccecery, though I dont think the PC would be causing the stalling in this instance.

    Mike
     
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  3. Moto_Garage
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    Moto_Garage Member

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    Can you please clarifiy your statement?
     
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  4. BeltandBevel
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    BeltandBevel Member

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    Ducati seem to be using more preload on the cranks when they build engines lately. This puts alot of resistance and load through the main bearings, and may be causing the stalling issues. We've seen cranks so tight that even with top ends removed they're tight to turn.

    There were several changes and Service Bulitens that Ducati issued regarding this problem, including checking TPS and throttle body base settings. If it's idling low, and has a tighter than usual crank then this might be the issue??

    Its hard to diagnose over a keyboard, but as said before, its dangerous, its not right, and should be looked at.
     
    Last edited: Jun 25, 2013
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  5. DonT
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    Not since 1978, new(er) Ducatis have no character :)
     
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  6. power6994
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    power6994 Member

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    It happens a few times before the commander went on. I didn't ride it much before getting it installed.
     
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  7. Crabman
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    Crabman Member

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  8. Crabman
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    Crabman Member

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    Something a buddy sent me yesterday. ..
    [​IMG]

    Sent from my GT-I9300T using Tapatalk 4
     
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  9. Ca Cycleworks
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    Ca Cycleworks New Member

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    Hi guys,

    One of the members here pointed us to this thread asking why we no longer have the kit on our site. I thought I'd copy to this thread the explanation and your options.

    Background

    We did have a complete solution for your wires leaking problem. Chris realized that the 1098, Hypermotard, and other Ducatis with the oval fuel flange were constructed differently. They have a small diameter solid plastic plug as the seal, where all the large diameter flanges on Monsters, Multistradas, and 999 family superbikes used an epoxy filler that breaks down. Chris thought to make a sleeve adapter to make the 1098 type wires fit into the larger flange holes on your bike.

    We commissioned wires to be made like the 1098 wiring from its fuel flange and then put together a kit to make it so this can be used on your bike. This product and kit we made to address your wires problem is described here: http://ca-cycleworks.com/fwireslg However something went wrong with the resin blending for the black plug thing on the wires & a lot of our wires would develop a leak. The rest of the kit is solid; it was the wires themselves that were leaking.

    Options & Information

    We still don't have a solution, but Chris has come up with some hacks for mechanics to perform to get it fixed. See below.

    Option 1: Replace wires with Ducati p/n 51020032A , but they will eventually break down the same way the stock wires did after years of use. You can order them from ducatiseattle.com

    Option 2: {**BEWARE: This is not an easy solution and requires electrical understanding.}We sell you the aluminum sleeve adapter and all the little bits from our kit and then you buy this fuel flange from AF1 or any Ducati oval fuel flange. The Aprilia fuel flange is made by the same people as the oval 1098 type of flange. You then take the properly resin'd wires from that Aprilia flange to use for your bike with our sleeve + kit. Our modified kit is here: http://ca-cycleworks.com/catalogsearch/result/?q=fwbits

    We have an automotive manufacturer reviewing our wires so that we can get the black resin plugs re-made properly. There is no ETA of availability.

    Here is a how-to write up that a customer did:
    http://www.ducatimonsterforum.org/index.php?topic=61306.0

    Our videos for option 2 , ,

    Good luck!!
    Candice B
    Ca Cycleworks inc
     
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  10. supamodel
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    supamodel Secret Aaaaaagent Man Staff Member Moderator Supporter

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    Hi Candice and CA Cycleworks(1) and welcome to CR, thanks for the info (I'm also on the DMF and a few other places).

    ... and I'm the annoying bloke who bought a pitbull stand from you guys a few years ago that was a nightmare to post :D. Rear stand is still awesome, so it was good we sussed it all out :).

    (1) Buy good Ducati and other bits from these people, they're pretty awesome. Only decent aftermarket belts for Ducatis, for one.
     
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  11. Ca Cycleworks
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    Ca Cycleworks New Member

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    Glad to hear it! Thanks for the feedback! -Candice
     
    #31
  12. Phil G
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    Phil G New Member

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    Is it possible on a 2003 Monster 620 Dark that the same issue is happening?

    Is there enough slack in the wiring that I can remove the plug in the picture and attempt a fix? (see picture)

    I don't have the same opening but the fuel gauge and the fuel pump are supplied power by a similar set of wires. This bike only has 6k miles on it and I experienced the same intermittent failure to pressurize the tanks until it fully stopped. The fuel gauge appears to be working since it shows my tank with low fuel but the fuel pump has stopped. If it is the wires then wouldn't the fuel pump AND the fuel gauge fail?

    Replacing these two will likely fix the issue but I would rather re-solder a poor connection instead of the hundreds of $$$ to get new parts that will fail again.

    Accessing the fuel pump looks like a hassle and I need a way to drain the tank without a working fuel pump to assist. Which of the 4 tubes will use gravity to drain the tank?

    Thanks!
     

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    #32