Date: Wed, 28 Apr 1999 21:41:06 -0700 From: "Douglas Swank" <dswanknopsamlwebSPAM.com> Subject: Re: trip computer
<sfreundnopsamejanews.com> wrote: > > I just bought a '90 9000 CD Turbo, and the trip computer mileage indicator > drives me a little bit crazy. I can understand how it goes below 20 miles an > hour when you are accelerating, what I don't understand is why it goes up to > 80 or 90 when you take your foot off of the accelerator. Is this supposed to > be happening. Of the two 9000s I have owned and 4 other 9000s I have driven (all pre-'90's FWIW), the "trip" computer has indicated two different MPG readings: average and instantaneous. You can press the "INFO" button to cycle through these settings, as well as estimated range in miles, voltmeter, and outside temperature. You are almost definitely looking at the instantaneous reading, and, yes, it is known to fluctuate this much. The instantaneous MPG changes based on both your vehicle's speed and engine speed, and can, under certain conditions indicate what would seem in the long term to be either a ridiculously high or low value. To reset the average MPG, hold down the "R" and "INFO" buttons for about 5 seconds. I have noticed that the average MPG reading tends to err a tad on the conservative side. For example, my '86 9000T generally estimates 24-26 MPG but when I fill up at the pump and calculate mileage, it's usually between 26-30 MPG. Your mileage may vary (literally!), -Doug
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