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Thread: Fuel System - Surge Tank Running Empty

  1. #1
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    Default Fuel System - Surge Tank Running Empty


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    Hi Guys

    I have an issue with my car where the surge tank runs empty which of course makes the engine die.

    Car: MK1 Ford Cortina
    Engine: 4AGE Blacktop with stock ECU
    Fuel System: Goss GE239 lift pump, 2L surge tank, Bosch 044 fuel pump, 10mm feed line, 8mm return line. There is a element filter before the lift pump, an efi filter after the Bosch.

    This issue has been happening for a while, It drives sweet for half an hour or more then will run out of fuel e.g. the surge tank is empty. I was running a carter black lift pump and it had the same issue.

    Does anyone have any theories of what the cause could be?

  • #2
    Senior Member Hen may possibly be a nut's Avatar
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    How are the fuel lines plumbed?

    Usually the return line from the rail should return to the surge tank. If this goes straight back to the fuel tank then you may empty the surge tank if your EFI pump is larger capacity than your lift pump.

    If the return line is already to the surge tank then my only guess is that the lift pump is not up to the task. Either too small, blocked lines, pickup dodgy/kinked/blocked screen, or maybe that it is sucking air somehow and losing its prime. Funny how it only turns up after half an hour.

  • #3
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    My guess is that you are loosing fuel pressure as the pump heats up from running. Is it possible to plumb in a pressure gauge verify. Is it possible to improve the cooling of the pump. DaveW7

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