Eos (1F7) L4-2.0L Turbo (BPY) (2007)
If the fuel pressure falls again:
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Check the fuel line to the high pressure pump for proper seal.
If no malfunction can be found:
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Replace the high pressure pump.
If the fuel pressure no longer falls:
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Check the fuel line to the fuel filter for proper seal.
If no malfunctions are found on the fuel line:
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Check the fuel pump check-valve.
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Connect a High pressure fuel gauge between the fuel filter and fuel supply line.
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Open the shut-off valve of the pressure gauge.