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Home > Technical > Excessive fuel consumption? |
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Bobupndown Member Since: 26 Dec 2014 Location: Upside down behind the TV! Posts: 2796 |
What size of fuel tank had the jaguar compared to the Freelander?
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17th Jun 2022 6:10 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1376 |
The range shown is based on the average consumption over the last 30 miles or so. So if you’ve been on an economy drive and then fill up you’ll see a range above 500 miles (I’ve seen 600). If you’ve just spent the last 30 miles in stop start traffic you’ll see a much lower range. My ancient 2007 TD4 averaged an actual 33 mpg over the last 12 years I owned it. |
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17th Jun 2022 6:25 am |
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Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4905 |
As already said fill up the tank. Then what I do is on the back of the receipt write down all the trip data. Once you have done that then reset the trip meter. Repeat for the next lot of fuel. Ideally do it 3 times. Best to reset the trip meter each tank full to stop rounding errors.
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17th Jun 2022 6:56 am |
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JLRnutJohn Member Since: 16 May 2022 Location: Northamptonshire Posts: 5 |
Thanks guys. I hadn't considered the potential difference in tank sizes. Currently the MPG is showing 21.7 after a reasonable run (country lanes & dual carriageways and certainly more than 30 miles), which is a little alarming!
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17th Jun 2022 9:07 pm |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1376 |
That seems low to me. I’d have to be really going for it to get that poor an mpg. Have you checked your tyre pressures? Have you checked them with another gauge, preferably one that has been certified to confirm that your gauge is correct. Is the gearbox behaving and the clutches within it locking up correctly? I’m not an expert on auto boxes but I’d expect a given gear to give a consistent speed at a given rpm. Do all the wheels run freely. Is a brake binding slightly, a disc will be hotter than the others, use a heat gun rather than your fingers! |
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17th Jun 2022 10:00 pm |
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JLRnutJohn Member Since: 16 May 2022 Location: Northamptonshire Posts: 5 |
Thanks BossBob. I don't think I have a gearbox problem. I'm no auto expert either, but it seems to be reasonable smooth and consistent. I have noticed that, despite having had a service before I collected it, the fuel filter isn't new. I have also read another post describing how to use injector cleaner directly into the engine. So my plan is to check tyre pressures and replace the fuel filter, priming it with injector cleaner to see if that helps. I also strongly suspect I have a leak in the intercooler (a small leak of oil accompanied by a hissing sound). This will be affecting fuel economy, but not to that extent I wouldn't have thought. It's going back to the garage I bought it from next week to have the intercooler sorted. |
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18th Jun 2022 9:56 am |
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AJ918 Member Since: 26 Mar 2018 Location: North West Posts: 260 |
If replacing the fuel filter I would strongly recommend that you use a genuine Land Rover part LR001313 or least a Purflux FCS604 as the OE filter is made by Purflux non genuine have been reported on the forum to cause various issues so best stay genuine to ensure no problems. |
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18th Jun 2022 10:26 am |
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BossBob Member Since: 30 Sep 2010 Location: Bristol Posts: 1376 |
A slipping clutch will give the appearance of a smooth drive as it will dampen out rapid changes in engine speed. The intercooler leak is not good especially if you can hear it. A dirty fuel filter normally gets you into limp mode with a resulting loss of power. I agree with getting a genuine fuel filter, they contain a temperature sensor that redirects fuel. |
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18th Jun 2022 11:52 am |
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Lightwater Member Since: 21 Aug 2014 Location: Sydney Northern Beaches Posts: 4905 |
Have a look at the air filter & see if it is new.
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18th Jun 2022 12:50 pm |
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Nodge68 Member Since: 15 Jul 2020 Location: Newquay Posts: 2071 |
I'd be checking the brakes for binding. Anything under 25 MPG is bad, my own ancient TD4 gives between 29 and 33 MPG, depending on the roads I'm driving.
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18th Jun 2022 4:14 pm |
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JLRnutJohn Member Since: 16 May 2022 Location: Northamptonshire Posts: 5 |
Thanks again all,
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19th Jun 2022 9:30 am |
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Chuckalicious Member Since: 23 May 2014 Location: Midlothian Posts: 1796 |
Sorry to resurrect an old thread, but this was pointed to in a new thread, so didn't want to start another.
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20th Aug 2024 7:16 pm |
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Bobupndown Member Since: 26 Dec 2014 Location: Upside down behind the TV! Posts: 2796 |
The discussion relates to fuel filters, not oil filters. Non OE fuel filters are known to cause running issues so most stick to genuine LR or Purflux who are the OE manufacturers.
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20th Aug 2024 8:49 pm |
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Chuckalicious Member Since: 23 May 2014 Location: Midlothian Posts: 1796 |
So it is! I’ll need to check what my fuel filter has been replaced with. Assuming it has been…
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20th Aug 2024 9:23 pm |
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