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Thread: 2020 crf110 fuel injection problems?

  1. #1
    KTMTalk Member
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    Default 2020 crf110 fuel injection problems?

    hi,


    My daughter has a 2020 crf110. I turned the key on today and the fuel pump ran as usual but instead of shutting off after about 5 seconds it continued to run the whole time the key was on (and the bike wasn't started). The bike runs fine and even shuts off with the bank angle sensor the only problem is the pump runs constantly. From the wiring diagram that CJR performance provided i see no fuel pump relay (that might be stuck) it seems to come right out of the ecm. Is there something that could be forcing the pump to run constantly?

    What actually tells the fuel pump on a dirtbike to stop?

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  3. #2
    KTMTalk Member Speedy88's Avatar
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    Default Re: 2020 crf110 fuel injection problems?

    Quote Originally Posted by Ievko82 View Post
    hi,


    My daughter has a 2020 crf110. I turned the key on today and the fuel pump ran as usual but instead of shutting off after about 5 seconds it continued to run the whole time the key was on (and the bike wasn't started). The bike runs fine and even shuts off with the bank angle sensor the only problem is the pump runs constantly. From the wiring diagram that CJR performance provided i see no fuel pump relay (that might be stuck) it seems to come right out of the ecm. Is there something that could be forcing the pump to run constantly?

    What actually tells the fuel pump on a dirtbike to stop?
    Maybe a cracked fuel filter.

    I presume there is a fuel pressure sensor that shuts the pump off @ 50+ psi.

    If the filter is cracked, it can't build up to that pressure, but it might still run.
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  4. #3
    KTMTalk Member
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    Default Re: 2020 crf110 fuel injection problems?

    Quote Originally Posted by Speedy88 View Post
    Maybe a cracked fuel filter.

    I presume there is a fuel pressure sensor that shuts the pump off @ 50+ psi.

    If the filter is cracked, it can't build up to that pressure, but it might still run.

    Not a bad idea but I'm not sure it has a pressure sensor. I believe its simply a mechanical regulator. There are only 2 wires coming off the pump a 12v and a ground that runs to the ecm.

  5. #4
    KTMTalk Member stewy604's Avatar
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    Default Re: 2020 crf110 fuel injection problems?

    Warranty? Might be time to get the dealer involved?

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