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Eml fault codes on lpg

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Old Oct 31st, 2019, 20:19   #1
a11mcr
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Default Eml fault codes on lpg

Hi I have just got my v70 and when it runs on lpg the eml is on and I get the attached fault codes, is this normal or is there anything I need to do?
P0088 fuel rail system pressure too high
P0090 fuel pressure regulator 1 control circuit

The system is a Romano multi point injection system and linked to the obd
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Old Nov 3rd, 2019, 16:39   #2
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The reason for the fault is that this age car needs a return line fitting on the petrol rail to keep the petrol pressure correct.
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Old Nov 4th, 2019, 15:27   #3
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Originally Posted by classicswede View Post
The reason for the fault is that this age car needs a return line fitting on the petrol rail to keep the petrol pressure correct.
Thanks for the reply, could you please advise on how I can do this, I am very good mechanicly lol
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Old Nov 7th, 2019, 02:32   #4
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there is a take off valve under the car. You need to run a pipe from that to the sender unit or filler neck with a solenoid powered by the LPG power cable. The flow needs calibrating to simulate normal petrol flow.
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Old Nov 10th, 2019, 22:06   #5
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there is a take off valve under the car. You need to run a pipe from that to the sender unit or filler neck with a solenoid powered by the LPG power cable. The flow needs calibrating to simulate normal petrol flow.
Thanks Dai, I can fit the pipe and solenoid valve but how do I go about calibrating the flow?
If I just leave it as is would it cause any problems?
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Old Nov 11th, 2019, 10:53   #6
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Left as is the fuel mixture will never be right as the fuel pressure is part of the fuel table
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