On-board computer showing increased fuel consumption

[radek at istar.ca]

Well, I'm talking here relatively steady highway driving in fifth gear, somewhat above 100
km/h.  Normally, fuel
consumption oscillates between about 6 and say 16l/100 km.  Suddenly, it starts showing 40
or 50, just to go
back to the normal range a few minutes later.   Any ideas why?

Radek
88 90'q


>
> Message: 11
> Date: Thu, 21 Feb 2002 15:29:12 -0500
> To: radek at pop.istar.ca, quattro at audifans.com
> From: Kneale Brownson <knotnook at traverse.com>
> Subject: Re: On-board computer showing increased fuel consumption
>
> --
> The instantaneous mileage feature jumps around crazily depending upon
> whether you're going up a slight grade or down one, whether there's a
> headwind, whether you're "drafting" behind another vehicle, etc.
>
>
> At 03:18 PM 02/21/2002 +0000, radek at pop.istar.ca wrote:
>
> >Hello listers:
> >
> >The on-board computer in my car is acting up.  It shows current fuel
> >consumption, usually
> >not exceeding 20  liters/100 km.  Lately, it started occasionally showing
> >consumption in
> >the range of 50
> >liters/100 km when driving in 5th gear which is absolutely outrageous.  I
> >wonder if it's
> >the computer that's
> >gone wild or is my car actually burning all this gasoline.  The problem
> >comes and goes,
> >I'd be driving on the
> >highway showing 10 l/100, next time I look it's showing 55 l/100, a few
> >minutes later it's
> >back to 10l/100.  All
> >this with no noticeable difference in the way the car behaves
> >(acceleration, noise etc.).
> >  Where is the computer
> >getting its data from?  Should I simply disregard the computer or is it a
> >hint to start
> >digging into the fuel
> >system?  TIA for any suggestions.
> >
> >Radek
> >88 90'Q