Fuel conusmption max limits on a 2002 Sprint ST - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #21 of 31 (permalink) Old 06-14-2019, 08:19 AM
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I thought I read somewhere that it's not a good idea to let an EFI machine run out of fuel--it's hard on the fuel pump and hard on the injectors to run without fuel going through. It may have been in a different context but running the system dry is something I try really hard to avoid.
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post #22 of 31 (permalink) Old 06-14-2019, 08:54 PM Thread Starter
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Originally Posted by Doberperson View Post
I thought I read somewhere that it's not a good idea to let an EFI machine run out of fuel--it's hard on the fuel pump and hard on the injectors to run without fuel going through. It may have been in a different context but running the system dry is something I try really hard to avoid.

Well, yes. Running dry is bad for any fuel pumps. They are submerged, and use the gas as coolant of sorts. This was a one time experiment. Testing the farthest limits.

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post #23 of 31 (permalink) Old 06-21-2019, 02:21 PM Thread Starter
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Originally Posted by Duckadiledundee View Post
Thatís excellent fuel consumption..I get about 140miles and fuel light comes on..I get maybe another 20 miles after that ...
Its now gone motorbike hospital to get sorted...
What was the prognosis?

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post #24 of 31 (permalink) Old 06-21-2019, 08:02 PM
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Bski Beat...still trying to figure that one out but it got a lot worse ....let you all know when as soon as I do .....
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post #25 of 31 (permalink) Old 06-22-2019, 03:37 PM
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... I just cleared up that problem by reaming out the metal nipple down on the side where the drain hose is attached to the tank. Take a small drill bit and drive into the nipple with your fingers ....
It would be best to remove the nipple(s) from the tank before clearing those; and then you would need to repeat up into the tank itself
Just be careful - where the nipples screw in, there are actually copper tubes attached which extend up through the tank to the filler neck - you do NOT want to puncture those tubes! Hence the advise above to just use a small bit and only with your hands, not an actual power tool.
When you re-insert the nipples, blow up through the hoses attached to them to ensure you have an open path.
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post #26 of 31 (permalink) Old 06-22-2019, 04:06 PM
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p.s. Miles are miles (unless they are km )
But recognize US gals and 'old' UK gals and of course Litres make for different values in mpg.
Sure however, just miles till low level light should be consistent (assuming filled to the neck)
Note that when filling the level WILL go down somewhat as it fills the various cavities in the tank - so you may have to 'top it off' a few times to get an accurate starting and refill point.

But any way you look at it 19.73 gals is 5.2 US gals and that is a LOT of gas for 106 miles!!!

And you're confident the trip is not being reset? (the trip memory is maintained by a constant voltage source from Fuse #3 - if it resets to zero when you turn off ignition, that fuse is blown)
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post #27 of 31 (permalink) Old 06-24-2019, 09:31 PM
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Needle was just above the red when I refuelled it today and she only took 11.59 litres. There's still 9.4 litres in the tank and I'd done 204kms (126.76 miles). She should do another 165 or so Kms (102.5 miles) before she's dry.
I'll wait until the light comes on next tank and see but I was anxious to see what the mileage was after fixing the fuel leak at the quick disconnect. 34mpg (imperial) before to 49 this time. ��

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Last edited by SpearChucker; 06-24-2019 at 09:35 PM.
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post #28 of 31 (permalink) Old 06-25-2019, 04:05 AM
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Mine is definitely using fuel at an accelerated rate and I know it as not got any spare hiding anywhere else and I believe that the fuel light is probably the only thing working on my bike the way it should ( lol..hey at least something is working correctly on the bike..it’s a start..)
Just short of 30 quid to fuel up proves it is using that fuel..
Could it be from when I had a bash at throttle balance..maybe that’s upset my bike
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post #29 of 31 (permalink) Old 07-02-2019, 09:08 AM
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I usually get 70miles before the first bar is used up on my 2005 ST 1050
I almost never let it run below half, but thats about 130 miles.

Ive done a full tank once in the past and I think that was about 240odd.

I usually get 45/50mpg at **cough** 70mph +/-15mph
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post #30 of 31 (permalink) Old 07-03-2019, 07:58 PM Thread Starter
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Quote:
Originally Posted by Duckadiledundee View Post
Mine is definitely using fuel at an accelerated rate and I know it as not got any spare hiding anywhere else and I believe that the fuel light is probably the only thing working on my bike the way it should ( lol..hey at least something is working correctly on the bike..itís a start..)
Just short of 30 quid to fuel up proves it is using that fuel..
Could it be from when I had a bash at throttle balance..maybe thatís upset my bike
Dirty air filter? Dirty fuel injectors? Pour some fuel injector cleaner in the tank next fill up. Can't hurt.

People who say they don't care what people think are usually desperate to have people think they don't care what people think. -George Carlin
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