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27th September 2016, 08:03 AM
#1
Bad fuel economy - reasons?
Hi guys. Any advice will be appreciated.
I've recently purchased a 2009 MY08 ST Patrol with 120k on the odometer.
I've done a test on fuel efficiency for town driving only and got 16.6L/100 (17MPG)
I was expecting to get around 13L/100 so makes me believe there could be an issue somewhere.
The vehicle is stock standard with no accessories using standard size road tyres. I gave it an oil change as soon as I got it home and replaced oil and air filters.
I have driving it around trying to save on fuel, so no heavy foot and still got the poor results.
I have been driving around with the O/D on which was stated in the manual. Not sure if this would help town driving if it were switched off.
I have used a fuel conditioner on each fill up.
After a highway trip it returned nearly 14L/100.
Is there anything I could do/ or check to help improve efficiency? Could the EGR valve not be functioning properly and affecting economy?
Kind regards,
Aaron.
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27th September 2016 08:03 AM
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27th September 2016, 08:57 AM
#2
20160927_081344.jpg
This is an image of oil around turbo. Could this be the issue?
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27th September 2016, 10:50 AM
#3
I am he, fear me
Clean the MAF sensor and disconnect the Battery for 30 minutes to force the ECU to 'relearn' the settings and see how that goes.
Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.
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The Following User Says Thank You to the evil twin For This Useful Post:
BigRAWesty (27th September 2016)
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27th September 2016, 12:14 PM
#4
Originally Posted by
the evil twin
Clean the MAF sensor and disconnect the Battery for 30 minutes to force the ECU to 'relearn' the settings and see how that goes.
Thanks. Just bought some MAF sensor cleaner. Will give it a go and clean out intercooler an see how that goes.
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27th September 2016, 12:22 PM
#5
Patrol God
a catch can should keep your IC cleaner but if its oily to look at,,chances are its leaking.
Nothing you can do about it except buy a fully tigged replacement
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
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27th September 2016, 12:31 PM
#6
SUCH IS LIFE
Being a CRD, drive it like you stole it...lol These motors love revs and perform best in high RPM range. I hit 4000RPM every gear change
With that oil leak, just clean it and tighten the clamp...should sort that out
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The Following User Says Thank You to Maxhead For This Useful Post:
jack (27th September 2016)
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27th September 2016, 12:42 PM
#7
Originally Posted by
threedogs
a catch can should keep your IC cleaner but if its oily to look at,,chances are its leaking.
Nothing you can do about it except buy a fully tigged replacement
I'm not sure yet if the intercooler is oily. I have yet to remove it and inspect. I will order the plate and scangauge II so will probably do it then. For now I'll try cleaning MAF sensor as suggested.
Anyone have an easy to follow guide on doing that?
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27th September 2016, 01:39 PM
#8
I am he, fear me
You need the appropriate Torx bit to fit the sensor retaining screws.
Pull the sensor out and spray the ports liberally with cleaner
Allow to dry and refit
Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.
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27th September 2016, 01:49 PM
#9
Patrol God
Your cooler will be oily inside. What Threedogs is saying is that stock coolers leak around the pressed ends.
You sometimes can see oil patches on the fins when they are a bit dusty.
Give the maf a clean as above.
But autos will always use more fuel than a manual.
I get 13-14L/100k on the highway so if your getting 16 around town I'd say that's a good average..
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27th September 2016, 03:48 PM
#10
Patrol God
Its straight forward as ET says dont over think it
just spray over a white tissue or cloth.
Not sure on the size of the torx tool required
its either a number 2 or a 20,,,,anyone,,,
Make sure its dry before installing it again
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
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