Variations in HDi fuel consumption

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Doggy
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Re: Variations in HDi fuel consumption

Post by Doggy »

trufflehunt wrote:I promised myself that I would never, ever again treat a fast car in such an irresponsible manner.
I had to do something pretty much the same every few weeks to convince my TR6 that getting all 6 pots to fire really was a good idea.
Never got anywhere near 30 though. :twisted:
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PeterN
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Re: Variations in HDi fuel consumption

Post by PeterN »

:) That's what I like about the north of Scotland - no traffic. No coasting though, that actually uses more fuel if the hill is steep enough to not use any throttle.

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Re: Variations in HDi fuel consumption

Post by grasmere59 »

My car does the same journey (Oxford-Derby-Oxford) every other weekend all year round and nearly always the same route and the MPG definitely goes up in the warmer weather,it very rarely does short journeys so in my mind warm weather = better MPG.
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dave406
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Re: Variations in HDi fuel consumption

Post by dave406 »

Think your all lucky i get 20mpg round town in the slushmatic :roll: :oops:
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Re: Variations in HDi fuel consumption

Post by grasmere59 »

I'm up to about 45-48 on my journeys at the moment,probably get a tad more if the weather warms up more.
2011 "11" Mondeo TXS est 200ps in Grey
2003 "53" 110 hdi Executive Estate in Diablo Red
2001 "51" BMW 530i sport in Black
2012 "62" Yamaha XT1200
1974 "M" Honda CB500/4
1994 "M" Kawasaki Zephyr 1100
1998 "S" Honda XRV 750
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Re: Variations in HDi fuel consumption

Post by OllieNZ »

PeterN wrote::) That's what I like about the north of Scotland - no traffic. No coasting though, that actually uses more fuel if the hill is steep enough to not use any throttle.

Peter
I thought modern cars didn't bother injecting fuel unless you have your foot on the throttle or at idle?
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Re: Variations in HDi fuel consumption

Post by PeterN »

That's correct, that's why I said you use more fuel by coasting, at idle the display is showing about 300mpg, in gear going down a hill it shows zero.

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Re: Variations in HDi fuel consumption

Post by grasmere59 »

Mine shows zero at idle and coasting down a hill in gear :?
2011 "11" Mondeo TXS est 200ps in Grey
2003 "53" 110 hdi Executive Estate in Diablo Red
2001 "51" BMW 530i sport in Black
2012 "62" Yamaha XT1200
1974 "M" Honda CB500/4
1994 "M" Kawasaki Zephyr 1100
1998 "S" Honda XRV 750
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Re: Variations in HDi fuel consumption

Post by PeterN »

Yes but not if its idling when you are going down a hill - try it.

Peter
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Re: Variations in HDi fuel consumption

Post by steve_earwig »

From my experiments with a suspect tps on my fist BX, fuel was cut off over 2,000rpm if the throttle switch says the throttle is shut. So if you were going down hill in gear, foot off the clutch pedal, no throttle, over 2,000rpm, fuel consumption should be zero. Not sure if more modern cars are like that but I'd expect them to be.
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PeterN
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Re: Variations in HDi fuel consumption

Post by PeterN »

That would have been a mechanical pump, as far as I know the electronic systems cut the fuel off immediately the engine is being driven by the car - until you get to tickover speed.

Peter
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Re: Variations in HDi fuel consumption

Post by steve_earwig »

Oh,sorry, I should have said it was petrol. Not mechanical at all really.

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Re: Variations in HDi fuel consumption

Post by PeterN »

Ah well, that would make a difference :)
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