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RobTee

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1

Monday, July 4th 2016, 12:11pm

dirty fuel after-effect?

Greetings,
A few months back, during a trip to the wild coast, I got a fuel filter warning - presumably dirty fuel (diesel) from my previous fill-up in Port St Johns.
Back in Cape Town I had the filter replaced, no problems (but I had to pay, despite the service warranty)
But now I am noticing that my average city-driving consumption now (below 9.9 km/l) is lower than it was before the trip (around 10.2 km/l). See the attached graph from my fuel consumption app (called Road Trip - if anyone's interested).

So my question is: is it likely / possible that the dirty fuel has caused some other problem that is affecting my fuel consumption??

I am no techno-boffin, so would appreciate some ideas or suggestions...


Thanks,

RobTee
2014 Fortuner D4D Epic; 4x4; 36000km
RobTee has attached the following image:
  • fuel consumption.jpg

This post has been edited 1 times, last edit by "RobTee" (Jul 4th 2016, 1:52pm)


Erik

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2

Tuesday, July 5th 2016, 3:36pm

Cant seem to find the app :(

Garreth G

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3

Wednesday, July 6th 2016, 9:31am

Hmm not sure. I would rest the everything on the dash.

Then take off the battery for a good hour or so. Fefit and drive the car like you normally would.

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RobTee

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4

Wednesday, July 6th 2016, 10:12am

Erik - the app is simply called Road Trip and has a square red icon with a petrol pump profile inside in white. There is also a lite version. I think I paid something for mine, but not much...
Aaah, sorry, I notice now it is only available for Apple ipads, phones etc ; not Android

RobTee

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5

Wednesday, July 6th 2016, 10:14am

Garreth - not sure what that would do ... ? And am reluctant to re-set everything ...
I'm thinking there might be something amiss with the diesel flow / burning efficiency...??
Anyone have any ideas?

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Wednesday, July 6th 2016, 2:14pm

give it a tank or 2 and see what it does
WIE PROBEER EN MISKIEN MISLUK IS BETER AS IEMAND WAT GLAD NIE PROBEER EN ALTYD MISLUK

:popcorn:

RobTee

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7

Wednesday, July 6th 2016, 2:25pm

Thanks rjansen, but I've already done 5 tank-fulls. If you look at the graph, each red triangle represents a filled tank and the fuel consumption of that tankfull.
The km/l trend of all 5 fills seems to have dropped from the levels of those before the wild coast trip...

Erik

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Wednesday, July 6th 2016, 2:27pm

Your difference is only 0.3km/l average, maybe something like a flat wheel could effect it by that amount?

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Wednesday, July 6th 2016, 2:40pm

When is the next service due?
WIE PROBEER EN MISKIEN MISLUK IS BETER AS IEMAND WAT GLAD NIE PROBEER EN ALTYD MISLUK

:popcorn:

RobTee

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10

Wednesday, July 6th 2016, 2:55pm

OK I'll check the tyres; and chat with service manager - 1500km to go; another 2 tanks :-)

Breekbeen

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Wednesday, July 6th 2016, 7:18pm

If I got 9.9km/l, I would be smiling all the way.

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Wednesday, July 6th 2016, 7:37pm

OK I'll check the tyres; and chat with service manager - 1500km to go; another 2 tanks :-)

Could also be the reason with a service around the corner
WIE PROBEER EN MISKIEN MISLUK IS BETER AS IEMAND WAT GLAD NIE PROBEER EN ALTYD MISLUK

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13

Thursday, July 7th 2016, 12:27am

Reason is that the ecu is a learning ecu. So if you drive badly it will take not of it. Then once you drive better to save fuel the ecu still remember the bad driving. So in other word you are allowing the ecu to rest so to speak and start learning how to react to your driving style.

A dirty air filter or air flow sensor can effect fuel efficiency

I went from 11.8 down to 9 so how's that. Maybe 9.8 on a good day.

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Thursday, July 7th 2016, 8:30am

I wouldnt be that concerned if I were you. My anywhere driving sits at about 7.8kms per litre. I have a V6 so I expect that. But any FT is so great to drive why worry about consumption. I will start to worry if it becomes 5 litres per km. 8)

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Thursday, July 7th 2016, 6:14pm

will start to worry if it becomes 5 litres per km.

+1
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16

Friday, July 8th 2016, 7:51am

We recently came back from a Botswana trip and I replaced my fuel filter, on the way back my fuel consumption fell from 9 km/l to around 7 km/l.
This was very strange, I inspected all odds and found that one off the main contributors was the wind factor. we were against the wind...

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