What could they have done to our fuel economy??

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Originally Posted by Stuart02

I still think it's down on mid range torque

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just doesnt rotate the earth like it used to hey,,,,:p

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Originally Posted by vnx205

As a driver of a 1998 Defender and a 1992 Camry, I have no idea how accurate those devices are that measure real time fuel consumption.

However, it seems to me that in view of the unusual data you are getting, you might need to fill the tank very carefully and note how much it takes to refill to exactly the same level to get some reliable data.

As long as you don't make the mistake of thinking that near enough is good enough each time you fill, that should give you accurate information, especially if you do it a few times.

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Thank you, sound advice, and the same as the best the Service Centre could offer too, not having heard of anything similar. They didn't suggest hard resetting or anything. It does concern me that there might be a fueling problem given it's lack of mid-range punch, but some hard data will help.

Yes these computers aren't known for their amazing accuracy but they usually have a consistent bias (ie not accurate but reasonably precise?).

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Originally Posted by Pedro_The_Swift

just doesnt rotate the earth like it used to hey,,,,:p

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i thought the days were getting longer...

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Originally Posted by Pedro_The_Swift

just doesnt rotate the earth like it used to hey,,,,:p

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Hehe, sadly no... and really, what's the point if you can't mess with the solar system! :P

I wonder if it's too late to ask Santa for a BAS remap... :D

DPF failing?
Simmo

Hmmm

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Originally Posted by simmo1

DPF failing?
Simmo

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Or an EGR failing:(

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Originally Posted by scarry

Or an EGR failing:(

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I wonder can that kind of thing be picked up by diagnostics?

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Originally Posted by Stuart02

I wonder can that kind of thing be picked up by diagnostics?

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Yes it can be,but i think it should bring up a fault code.

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Originally Posted by Stuart02

It's got a bit weirder cos I've figured out it's when the car is standing and idling that the average economy starts rising - 19.5 after a few red lights this morning. It drops slowly as the car moves. 240 km of freeway yesterday returned 9.8.

I still think it's down on mid range torque

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The penny just dropped:cool::cool::cool::cool:
You dont normally reset your trip meter when you re-fuel do you???
When they plug their diagnostic gear in it re-sets the fuel computer.
When you re-set with every tank,the economy starts off abissmal,like you posted,as it gets ks under its belt the numbers drop,just like you are reporting.;););););););)

Next,the adaptive learning of the gearbox also is reset when they plug gear in,normality will return to your driving style.This is your doughy mid range;););););)

Next re-fuel re-set the trip meter and watch the tumbling fuel numbers;);););) Your driveability should be returning as its adapting to how its driven.

I got given a D4 with identical specs as mine as a courtesy car,it went like a rocket thru the gears.When I returned it at the end of the day it was driving no different than mine;););););)

I hope Im correct.
GOODLUCK
Andrew