Date: Tue, 01 Feb 2005 09:08:32 +0000
From: Martin Rich <M.G.Richnospam.ac.uk>
Subject: Re: How does the CPU figure out how much gas?


On Mon, 31 Jan 2005 17:14:31 +0000, Colin Stamp <colinnospamp.plus.com> wrote: >It uses the same sender as the fuel gauge to find out how full the >tank is. The MPG calculation only needs the ECU/speedo data and is >quite accurate, but the DTE calculation needs the fuel sender info as >well. Because of that, it isn't nearly so accurate - mine often reads >more when I start up after parking on a hill than when I parked. Very >handy as a rough guide though. > I'd noticed this effect - sometimes quite dramatically when the tank is close to empty, since in practice I use the DTE indication to see how low I really am once the 'low fuel' light comes on. I've also noticed the DTE increasing while on the move, particularly if you accelerate away from a stop and then cruise for a while. Martin

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2019 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]