2005 Mazda 6 Diesel - Fuel Rail Pressure Issues
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  1. #1
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    2005 Mazda 6 Diesel - Fuel Rail Pressure Issues

    Howdy guys,

    Not sure where to turn with this one, as its really starting to p**s me off, constantly chucking problems and faults up.

    At the moment, I've managed to fix the injector issue by putting a fresh set of injectors in, then spending 2 days recoding them to the engine and ecu. The fault then progressed further down the line and after a little research and some time reading the codes, it came up with P0093 Fuel leak detected - large leak, which after searching was pretty much a red herring and it referred to a pressure loss in the common rail, indicating the Suction Control Valves in the High Pressure Diesel Pump were shot and required replacement.

    This has now been done, and the fault code has now changed. P0193 $07E8 Fuel Rail Pressure Sensor A Circuit High, and the Fuel Rail Pressure in PSI currently stands at 36213.0, which from memory is around 1500 PSI too high.

    Is there anyone out there with the knowledge of Mazda 6 Diesel engines, that can help out on this one, as the car will be pushed off the bridge around the corner and into the trent before long.

    Thanks in advance for any input...

  2. #2
    MisterBishi, Audi, BMW's
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    Mardybum's Avatar
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    Also, just to add, as I've forgotten to by the looks of it...

    The car is difficult to start, as if the fuel rail has lost pressure and runs rough for the first 10-15 seconds.
    Management light is on ALL the time from the key being turned, even after having the battery removed over night in an attempt to reset the ECU.

    Going out in the morning to check for air leaks around the turbo area, and the intake system. However a quick check over earlier revealed nothing untoward.

  3. #3
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    So what new bits has it had fitted?

    New injectors. New high pressure fuel pump?
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  4. #4
    MisterBishi, Audi, BMW's
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    New parts so far are;

    4x Injectors & Seats
    1x Suction Control Valve

    The high pressure pump is still the original by the look of it, and works perfectly.

  5. #5
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    ide say the pressure regulator system on it is favorite wotever vents the excess fuel back to the tank is usually the twat on sludgers...

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