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golf 5 gti fuel rail pressure

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generalen15:
hi, is there anyone who knows if the fuel rail pressure in fsi engine drop overnight or should it hold pressure until next overnight start? my problem is that overnight pressure it drop to around 6bar pressure.

pudding:
The high pressure side doesn't stay high, but the low pressure side should maintain 5-6 bar over night.  High pressure is built up again during cranking.

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