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I bought my 98 4.6 HSE about a month ago. The mileage and range figures worked fine when I got it. The first time I reset it, it showed a range of 999 and mileage of 99.9. It stays like this all the time until I get very low on gas. The range will eventually start to lower until it is around 650 when I am empty. I have reset it several times and nothing changes. Additionally, I have disconnected the battery and that didn't help. What could be causing this? Is there any connection between this and me getting very low gas mileage(10-11MPG)? It seems to run very well and I have no fault codes. Would a dealer or shop be able to give me more info on whether new O2 sensors would help? I can only go 180 or 190 miles before my gas light comes on between fill ups. Would using premium fuel help with these problems? Any advice would be greatly appreciated.
 

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Any landrover specialist will be able to read any fault codes for you.A reliable one that isn't too far away from you is Brooklyn Engineering in Southampton. They are quite fair with their prices too.
 

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Thanks for the reply. I don't have any fault codes so I am not sure what a service shop could do. Additionally, I am in Salisbury, North Carolina so I think your suggestion would be a little tough to get to!
 

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kevintj1s said:
Thanks for the reply. I don't have any fault codes so I am not sure what a service shop could do. Additionally, I am in Salisbury, North Carolina so I think your suggestion would be a little tough to get to!

Too much wine!
 

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1995-2002 Range Rover P38A
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Hi

The float mechanism in the fuel tank is most likely not sending the right signal towards the becm messing up the calculations.

The float mechanism is seperately for sale: Partnumber WGI 100020.

Changing it will need the removal of the fuel tank and the fuel pump inside.

Regards

Jos
 

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I was going to second the suggestion about the fuel pump assembly, but then realized your symptoms were totally different from mine. I was having issues with mileage calculating out at 11 mpg when it should have been closer to 18 according to pen and paper. Also was having an issue with stumbling / hard starting when hot. I replaced the entire assembly with a genuine unit, and have had none of those problems since. The assembly includes the fuel pump and the float assembly.

But now that I think it thru, I'd still consider it the prime suspect.
 
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