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  1. #1

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    Fuel pressure posibly to high?

    I have installed a inline fuel pressure regulator since the one on the fuel pump has fallen off. Cranking pressure is 23psi and running pressure is 32psi. Could it be posible that the regulator is intsalled backwards causing the high running pressure and would it hurt the fuel pump or engine if I left it as is?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    The fuel pump is electric, so the fuel pressure shouldn't change much between cranking and running.

    Have you confirmed that the external regulator is installed correctly?

    If it is installed backwards then the normal fuel flow and fuel circulation through the injector body will be reduced. The fuel circulation is used to cool the electrically powered injectors.

  3. #3

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    I checked and the fuel pressure regulator is installed in the right direction. I noticed if I let the engine run for 10 seconds or so that the pressure starts at 32psi and drops down to around 23psi. Im thinking it might be the regulator sticking when the engine first starts causing me to get high fuel pressure readings, once it does drop down to 23psi it consistanly stays there. Should this still be okay to run like this?

  4. #4

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    i had a new Polaris pump run at around 30-32 pounds and had no problems

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by polarismsx140HO View Post
    I checked and the fuel pressure regulator is installed in the right direction.

    I noticed if I let the engine run for 10 seconds or so that the pressure starts at 32psi and drops down to around 23psi. I'm thinking it might be the regulator sticking when the engine first starts causing me to get high fuel pressure readings, once it does drop down to 23psi it consistently stays there.

    Should this still be okay to run like this?
    That sounds fine.

    Only a handful of people have reported back since we started suggesting the Kawasaki regulator as a fix. So far none have mentioned any problems, other than needing to be careful with the orientation during installation.

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