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Registered
Join Date: Aug 2004
Location: Raleigh, NC
Posts: 12
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MPG Gauge Reads Off of what?
So anyone know what the MPG gauge reads off of for its movement?
I am having running issues, posted about that earlier, and noticed the other day that when the issues pop up the MPG gauge jumps all around. Is it vacum from somewhere, or maybe fuel pressure or flow? |
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11-08-2004, 07:34 AM
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Registered
Join Date: Nov 2003
Location: Downtown LA CA / North Texas
Posts: 1,175
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been wondering that myself... mine just dances all over the place..
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944 85.0 Kalahari Beige -- Dead/Gone/NotForgotten (Ran Like a Raped Banshee) 944 85.5 Guards Red Current Stable 944 83 Kalahari Beige manual rack, short 5th gear951 86 Guards Red, pristine TurboYou must not anger the Porsche Gods - you MUST leave one small item unrepaired, lest the Stuttgartians smite thine car with bad Ju-Ju-AF Juvat |
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11-08-2004, 11:43 AM
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Moderator
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The mpg gauge is completely electronic. It's value is calculated from injector duty cycle, and the speedo reading.
Ahmet
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Cheers! |
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11-08-2004, 11:52 AM
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Registered
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Mine doesn't dance much... it's related to the throttle position, obviously, but if I keep a consistant speed, it sits pretty still. On a good day, it reads just under 40 mpg at 65 mph. When I fill up, I always calculate my actual mileage and consistantly get 26-29 mpg.
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1983 944 - Sable Brown Metallic / Saratoga / LSD : IceShark Light Kit |
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11-08-2004, 12:39 PM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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MPG guage? I don't think my car has one...
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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11-08-2004, 01:04 PM
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entertaining the idea
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Quote:
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There are some who call me... 'Tim'. a well set-up 1983 Guards Red 944 |
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11-08-2004, 01:36 PM
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That Guy
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Early model 944's came with them above the tach, the only late model 944's which had the speedo were the '85.5 and the '86 years.
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Jon 1988 Granite Green 911 3.4L 2005 Arctic Silver 996 GT3 Past worth mentioning - 1987 924S, 1987 944, 1988 944T with 5.7L LS1 |
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11-09-2004, 04:10 AM
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1984 Porsche 944 2.5 liter, 8 valve 
1983 Porsche 944 2.5 NA
1983 Porsche 944 2.5L
The Kraut Burner
The Bratwurst Burner
Das Boost
