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Author Topic: I'm now expecting Tunnies Fuel Consumption!  (Read 1547 times)

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Taxi_Driver

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I'm now expecting Tunnies Fuel Consumption!
« on: 05 November 2006, 19:22:51 »

Checked my tyre pressures today.....

One ok at 30psi

One was at 27psi

Other two were 25 psi

All nicely blown upto 30psi now.....40mpg here i come  ;D
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Del Boy

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #1 on: 05 November 2006, 19:26:53 »

40 :o i get 14-17 but there again my wife says i have lead feat
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tunnie

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #2 on: 05 November 2006, 19:33:46 »

Quote
Checked my tyre pressures today.....

One ok at 30psi

One was at 27psi

Other two were 25 psi

All nicely blown upto 30psi now.....40mpg here i come  ;D

You should get that! ;)

I'll have to make a video next time of me re-setting the fuel gauge, then cruising @ 75 for 50 miles and show the result!

I usually put mine at 31 though, the book says 30.5 so i round it up.

Not using cruise control, and not hoofing it up hills, i easily get 40 on a motorway run @ 75mph...
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theolodian

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #3 on: 05 November 2006, 19:44:58 »

Quote
Quote
Checked my tyre pressures today.....

One ok at 30psi

One was at 27psi

Other two were 25 psi

All nicely blown upto 30psi now.....40mpg here i come  ;D

You should get that! ;)

I'll have to make a video next time of me re-setting the fuel gauge, then cruising @ 75 for 50 miles and show the result!

I usually put mine at 31 though, the book says 30.5 so i round it up.

Not using cruise control, and not hoofing it up hills, i easily get 40 on a motorway run @ 75mph...
My 3.0 Auto Elite with 225 tires will get 32+ on cruise at 80, as much as 35 doing what you describe.  The problem is that if I don't do any motorway I get 24 between fillups  :(  One of the main reasons is that it runs insanely rich during warmup.   >:(  On short trips it is in warmup half the time and just gulps fuel.
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Chopsdad

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #4 on: 05 November 2006, 19:56:37 »

Just been out today with a fresh tank of expensive BP Ultimate for a treat - 27 mpg at 75 ! I normally get 34 with this stuff in but need to clean breathers & fix emissions fault first I suppose.

I did get 40 mpg once - took a pic on my phone for prosperity - never repeated since.
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Taxi_Driver

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #5 on: 05 November 2006, 20:00:40 »

Quote
Quote
Checked my tyre pressures today.....

One ok at 30psi

One was at 27psi

Other two were 25 psi

All nicely blown upto 30psi now.....40mpg here i come  ;D

You should get that! ;)

I'll have to make a video next time of me re-setting the fuel gauge, then cruising @ 75 for 50 miles and show the result!

I usually put mine at 31 though, the book says 30.5 so i round it up.

Not using cruise control, and not hoofing it up hills, i easily get 40 on a motorway run @ 75mph...

Will have to try harder  ;D Usually @ 80mph on motorways it does 24/25 mpg on gas...ok add 10/15/20% for being on gas that only makes 30mpg max  :'(
But then gas is only at the mo 38ppl so who cares  ;D
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tunnie

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #6 on: 06 November 2006, 11:14:14 »

Quote
Quote
Quote
Checked my tyre pressures today.....

One ok at 30psi

One was at 27psi

Other two were 25 psi

All nicely blown upto 30psi now.....40mpg here i come  ;D

You should get that! ;)

I'll have to make a video next time of me re-setting the fuel gauge, then cruising @ 75 for 50 miles and show the result!

I usually put mine at 31 though, the book says 30.5 so i round it up.

Not using cruise control, and not hoofing it up hills, i easily get 40 on a motorway run @ 75mph...

Will have to try harder  ;D Usually @ 80mph on motorways it does 24/25 mpg on gas...ok add 10/15/20% for being on gas that only makes 30mpg max  :'(
But then gas is only at the mo 38ppl so who cares  ;D

Also petrol is about 7ppl cheaper than diesel at the moment! - Its taken the benefit right out of having an oil burner
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Taxi_Driver

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #7 on: 06 November 2006, 19:52:52 »

Quote
Just been out today with a fresh tank of expensive BP Ultimate for a treat - 27 mpg at 75 ! I normally get 34 with this stuff in but need to clean breathers & fix emissions fault first I suppose.

I did get 40 mpg once - took a pic on my phone for prosperity - never repeated since.

Will have to follow AA's howto on doing the breathers.....and see if that makes a difference....havent done it yet....coz since he posted the howto is been blinking cold out  :(

I fixed one of my veccies the other morning at 8am.....0c ....boy was i glad the engine was hot to keep my fingers from freezing  ;D
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Matchless

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #8 on: 07 November 2006, 09:35:52 »

Quote
My 3.0 Auto Elite with 225 tires will get 32+ on cruise at 80, as much as 35 doing what you describe.  The problem is that if I don't do any motorway I get 24 between fillups  :(  One of the main reasons is that it runs insanely rich during warmup.   >:(  On short trips it is in warmup half the time and just gulps fuel.[/quote]

Whats yours like on start-up....does it fire first turn or does it need a couple of goes? Is it better if you open the throttle slightly?

Reason I ask is that I think I have an incontinent injector which leaks fuel into the intake after switch-off, its then too rich on start-up next time and fuel consumption is far too high on short runs but OK on longer runs. I have another injector assy to fit when I get time so will see if my theory is correct.
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theolodian

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Re: I'm now expecting Tunnies Fuel Consumption!
« Reply #9 on: 07 November 2006, 09:44:20 »

Quote
Quote

My 3.0 Auto Elite with 225 tires will get 32+ on cruise at 80, as much as 35 doing what you describe.  The problem is that if I don't do any motorway I get 24 between fillups  :(  One of the main reasons is that it runs insanely rich during warmup.   >:(  On short trips it is in warmup half the time and just gulps fuel.

Whats yours like on start-up....does it fire first turn or does it need a couple of goes? Is it better if you open the throttle slightly?

Reason I ask is that I think I have an incontinent injector which leaks fuel into the intake after switch-off, its then too rich on start-up next time and fuel consumption is far too high on short runs but OK on longer runs. I have another injector assy to fit when I get time so will see if my theory is correct.
Fires right up.  There is no clear sign of anything mecahnically wrong.  Even after 300 miles, no matter how gently I drive my avg mpg drops steadily for the first few minutes of driving.  (It would not be shown in the MID if leaking injector.)  It continues a bit past when the engine temp comes up, assuming that is not a delayed reaction then the auto tranny and tires may be part of the  problem when cold.  I think it is fundamentally a tuning issue of too much cold start enrichment, with a possible cold tranny issue on top.
« Last Edit: 07 November 2006, 09:46:49 by theolodian »
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