LandRobert
Member
Hello Everyone,
So, last year I got my hands on a 2015 LR4 SCV6 with 10k miles (yes, you read that right ten thousand miles). It actually even has the new car smell. After driving it for a while I realized it was giving about 9 mpg. So the journey began:
By reading the engine coolant temp 1 and 2 we saw that sensor temp 2 (sensor next to the thermostat) was not increasing at all. So I decided to do a vacuum test on the coolant system and it wouldn't hold vacuum for more than 10 seconds. WS manual says 1 minute @ -1 bar. I decided to replace the front and rear crossover pipes, and surprisingly @ 10k miles the front crossover pipe was already failing, there was some evident seepage where the pipe meets the engine block. So the F/R crossover pipes were replaced, the oil cooler tube was replaced, water pump gaskets, intake manifold gaskets and thermostat. That took me about 6 months, the rear crossover pipe was in backorder (5 months and 29 days) 1 day to put it all back together.
The coolant system was vacuum refilled and out we went for a test drive. I was surprised to see the avg fuel consumption drop drastically to 17.5 mpg, however happiness was short lived. A couple of days later fuel consumption increased to about 10 mpg and the MIL went on. My iCar Soft scanner pointed out to be one of the HO2 sensors, so I took it off, checked it with the multimeter and indeed, the heating element was blown, multimeter showed OL across the element pins. So I went ahead and installed a new one and again out we went for a test drive, avg fuel consumption corrected to 12.7-13 mpg. And that's where we are right now.
How's your mpg doing in the city fellas? Some sources on the internet say that LR4s do 14 city, 19 highway, 16 combined. I know that 13 mpg is not too far from 14 mpg. So I just want to rest assured that there's nothing else to do on that matter.
Note: There's a Field Service Action Bulletin, published on Aug 22 that says:
To address concerns with the correct operation of the Oxygen (O2) Sensors, new Powertrain Control Module(PCM) software is required on the models, engine variants and Vehicle Identification Number (VIN) ranges described above.(my VIN is in the range)
Action to be taken
At the next service opportunity you are requested to reconfigure the Powertrain Control Module (PCM) with the latest level of software.
And this particular LR4 I've got has an OEM roof rack (wind drag?)
So that's about it, would you be so kind as of to share some data on your fuel economy?
Thanks a lot!
So, last year I got my hands on a 2015 LR4 SCV6 with 10k miles (yes, you read that right ten thousand miles). It actually even has the new car smell. After driving it for a while I realized it was giving about 9 mpg. So the journey began:
By reading the engine coolant temp 1 and 2 we saw that sensor temp 2 (sensor next to the thermostat) was not increasing at all. So I decided to do a vacuum test on the coolant system and it wouldn't hold vacuum for more than 10 seconds. WS manual says 1 minute @ -1 bar. I decided to replace the front and rear crossover pipes, and surprisingly @ 10k miles the front crossover pipe was already failing, there was some evident seepage where the pipe meets the engine block. So the F/R crossover pipes were replaced, the oil cooler tube was replaced, water pump gaskets, intake manifold gaskets and thermostat. That took me about 6 months, the rear crossover pipe was in backorder (5 months and 29 days) 1 day to put it all back together.
The coolant system was vacuum refilled and out we went for a test drive. I was surprised to see the avg fuel consumption drop drastically to 17.5 mpg, however happiness was short lived. A couple of days later fuel consumption increased to about 10 mpg and the MIL went on. My iCar Soft scanner pointed out to be one of the HO2 sensors, so I took it off, checked it with the multimeter and indeed, the heating element was blown, multimeter showed OL across the element pins. So I went ahead and installed a new one and again out we went for a test drive, avg fuel consumption corrected to 12.7-13 mpg. And that's where we are right now.
How's your mpg doing in the city fellas? Some sources on the internet say that LR4s do 14 city, 19 highway, 16 combined. I know that 13 mpg is not too far from 14 mpg. So I just want to rest assured that there's nothing else to do on that matter.
Note: There's a Field Service Action Bulletin, published on Aug 22 that says:
To address concerns with the correct operation of the Oxygen (O2) Sensors, new Powertrain Control Module(PCM) software is required on the models, engine variants and Vehicle Identification Number (VIN) ranges described above.(my VIN is in the range)
Action to be taken
At the next service opportunity you are requested to reconfigure the Powertrain Control Module (PCM) with the latest level of software.
And this particular LR4 I've got has an OEM roof rack (wind drag?)
So that's about it, would you be so kind as of to share some data on your fuel economy?
Thanks a lot!
