Re: [ST] Minor Stumbling Problem

["Peter Kroeker" <peter.kroeker@xxxxxxxxxxxx>]

When I had the tune updated there was some minor improvement but the 
condition didn't go away.  I know it originally had a tune that was at least 
4 years old prior to the update so I assume that the improvement was just 
from a better injection map overall.  So I don't think it has anything to do 
with the ECU losing the tune.

Other ideas?

Peter



>A friend of mine with a Daytona swears his bike 'loses' the tune over time.
> He has a tuneboy and re-loads it periodically.
>
>
>
> i had the same issue on my 03, reloaded the triumph tune and it went away.
> it was almost as if it lost the tune (though i didn't see how that was
> possible)...
>
> philip
>
> ----- Original Message ----
> From: Peter Kroeker <peter.kroeker@xxxxxxxxxxxx>
> To: ST@xxxxxxxxxxxxxx
> Sent: Thursday, May 3, 2007 2:59:12 PM
> Subject: [ST] Minor Stumbling Problem
>
>
> I need the collective wisdom of the group.  I have a '00 ST with Triumph
> carbon silencer and the latest Triumph tune installed last year.  I've
> owned it for 4 years.  It has 58,000km and has been a fantastic, reliable
> machine - with one small glitch.  Since day one, under steady throttle and
> light load, the engine stumbles below about 4000rpm.  Nothing major and 
> I've
>
> adjusted my riding style somewhat to compensate.  It is just a bit of a 
> pain
>
> when doddling around town.  Under acceleration, everything is fine.  It
> seems to also be fine when the engine is cold.  There is some minor
> backfiring when slowing.
>
> Here's my working theory:  The temperature gauge always reads in the cold
> range.  Could it be that the coolant sensor is giving the ECU an incorrect
> signal resulting in an incorrect mixture for the real engine temp?  I 
> expect
>
> this would make the engine run rich, but the plugs showed a nice tan 
> colour
> last time I had them out.  But it would explain the backfiring.
>
> What do you think?
>
> Peter
>
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