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fuel issues

This is a discussion on fuel issues within the General Help forums, part of the LSx Technical Help Section category; I have an A-1000, aeromotive filters, speed inc aluminum fuel cell, 42lb injectors, Aeromotive 5.7 rails, Aeromotive regulator, and braided ...

  1. #1
    Junior Member Ws6gerb10's Avatar
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    fuel issues

    I have an A-1000, aeromotive filters, speed inc aluminum fuel cell, 42lb injectors, Aeromotive 5.7 rails, Aeromotive regulator, and braided lines not sure the size of them but I know the lines returning to the tank are larger than the lines leaving it. My problem is that when I start the car fuel pressure is set at 58lbs when the car reaches normal temp the pressure drops and continues to drop and whenever I give gas instead of pressure increasing it decreases. Any thoughts would really help. Thanks

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    Member Transam388's Avatar
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    Sounds like the fuel pump is not upgraded to handle the bigger lines or is malfunctioning. You have increased the diameter of your fuel lines and rails but not gotten a pump to compensate for this so your pressure has gone down.
    98 T/A: HPE 5.3 Heads, 238/242 113 cam, Kooks 1 7/8 stepped LT headers, Custom Y pipe, Cut out, Borla, NW 90MM TB, FAST 90MM Intake, TB Bypass, Under Drive Power steering and Crank, 150 Dry NOS, Yella Terra rockers, 3400 TC, HPE tuning,

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    Junior Member Ws6gerb10's Avatar
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    The A-1000 needs to be upgraded then? To what?

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    Member Transam388's Avatar
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    From what I can see the pump itself may be the wrong one for your setup. Those A1000 are some good pumps but I think they are lower PSI like in the 45 to 50 PSI range. The stock fuel system is normally around 58 PSI. With not being totally sure of the compnents on your fuel system I would run by a shop and get their advice on how to proceed. I know not the answer you wanted but I don't want to steer you wrong!

  5. #5
    Junior Member Ws6gerb10's Avatar
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    haha! thanks I appreciate the help, most people are saying it is the pump and/or the filters need to be replaced

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