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-   LPG, CNG & LNG - General Info and Issues (https://www.volvoforums.org.uk/forumdisplay.php?f=183)
-   -   Eml fault codes on lpg (https://www.volvoforums.org.uk/showthread.php?t=300095)

a11mcr Oct 31st, 2019 20:19

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

classicswede Nov 3rd, 2019 16:39

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.

a11mcr Nov 4th, 2019 15:27

Quote:

Originally Posted by classicswede (Post 2568397)
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

classicswede Nov 7th, 2019 02:32

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.

a11mcr Nov 10th, 2019 22:06

Quote:

Originally Posted by classicswede (Post 2569578)
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?

classicswede Nov 11th, 2019 10:53

Left as is the fuel mixture will never be right as the fuel pressure is part of the fuel table


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