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VST tank overfilling. fuel coming out of vapour purge line into manifold

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  • #46
    Yep. That's what I changed. I went ahead and bought the rubber piece for the bottom also. It wasn't pliable at all and it was $6.

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    • #47
      Sadly the issue still exists. I have now replaced everything with the VST tank except the tank itself and the HP fuel pump. Engine also seems to be running rich and has a rough idle. If I unplug the EVAP switch it doesn't spray fuel. Think I'm gonna wave my white flag. Lol

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      • #48

        is fuel still coming out the top of the vst What do mean when you un plug The evap line no fuel coming out

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        • #49
          if no fuel is coming out of the top of the vst it won’t be running rich because of the vst unless the pressure reg is not blowing off, remember now that there will be no fuel leaking past the seal between the pump and the outlet the rail pressure will be a bit higher.
          If it is still coming out of the top of the vst I am sorry I have run out of ideas

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          • #50
            Yes it is still coming out of the vent line. The EVap purge solenoid switch is on the vent line. Vent line runs up to it the to the intake.
            I appreciate the help. I'm sure its something simple I'm not seeing.

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            • #51
              Is it possible the float itself is bad? This would prevent the needle valve and seat to shut off the fuel entering, and the vst would overflow?

              Just another possibility, good luck, post back on what you find out.

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              • #52
                Originally posted by Solarman View Post
                Is it possible the float itself is bad? This would prevent the needle valve and seat to shut off the fuel entering, and the vst would overflow?

                Just another possibility, good luck, post back on what you find out.
                New float was installed. Old one was tested and had no issues either.

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                • #53
                  Mechanic called and says its fixed. He's thinking it had a few issues but the last one was self inflicted. Lol. I installed the new Lp check/regulator backwards so the Lp pump deadheaded straight to the needle and seat which overpowered it. That's why this time it only trickled fuel out of the vent tube and didn't spray it a foot in the air like it was previously. Lesson learned. On a plus side I think I found a new HONEST mechanic. Most around here would have tried selling me a power head. Anyways, thanks for everyone's input.

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                  • #54
                    I think I asked that question page 2 post 27, any way lesson learnt, It is hard giving advice over the internet.

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