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Fuel Pressure is at 27psi!

This is a discussion on Fuel Pressure is at 27psi! within the General Help forums, part of the LSx Technical Help Section category; I just looked at my fp gauge under my hood. KOEO SHOULD sit at around 60psi, i turn the key ...

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    Unhappy Fuel Pressure is at 27psi!

    I just looked at my fp gauge under my hood. KOEO SHOULD sit at around 60psi, i turn the key and it went up to 30psi and dropped back to zero in a second. I cranked it up and its at 27 psi!!!! I couldn't figure out why it was throwing lean bank codes and taking forever to start until now. WTF. could it be my stock FP reg. in the tank?

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    Veteran Hi-Po's Avatar
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    Could be many things. Start with fuel filter, then look at fuel pump.

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    filter has 4k on it

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    Yeah baby! Yeah! silverWS6's Avatar
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    You should've predicted that mr.iknowthefuture jk... I say fuel pump imo

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    its a new walbro 255 with about 3k on it

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    Veteran 0rion's Avatar
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    My guess is going to be either a bad fp regulator or the venturi hose has popped off. Pretty common for that hose to come off.

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    Quote Originally Posted by 0rion View Post
    My guess is going to be either a bad fp regulator or the venturi hose has popped off. Pretty common for that hose to come off.

    ^^ Please explain what this is.

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    Fixed it. turned out the rubber fuel line popped of on the top where it connects to the sender assembly. :P Im suprised I had any fuel pressure and it even started like that :flex thanks for the help everyone

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    Quote Originally Posted by Iknowthefuture View Post
    Fixed it. turned out the rubber fuel line popped of on the top where it connects to the sender assembly. :P Im suprised I had any fuel pressure and it even started like that :flex thanks for the help everyone
    that's the hose I was referring too. That's the venturi feed line correct that feeds the bucket?

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    no, I cut the size of my sender off so it cools the pump better, so no need to have it pump in to the bucket. It was the main fuel line that comes off of the pump and plugs into the backside of the top of the sender unit to supply the engine fuel.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by Iknowthefuture View Post
    no, I cut the size of my sender off so it cools the pump better, so no need to have it pump in to the bucket. It was the main fuel line that comes off of the pump and plugs into the backside of the top of the sender unit to supply the engine fuel.
    ahhh ok. The problem with cutting that bucket up is you take the chance of starving the pump in corners so keep that in mind if you're taking fast corners. The plastic tanks don't have baffles in them to keep the fuel from laying against one side in the corners.

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