SilverLeaf Electronics, Inc.
2490 Ferry Street SW.
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VMS 645 Glass Dash Fuel Guage
I have a VMS 645 glass dash on a 2005 Allegro Bus.
First a minor one. The transmission mode symbol shows as a half circle showing only half of the M. The VMS manual describes this symbol as a full circle.
The main point of this email deals with the VMS fuel gauge. Starting with a full tank I show one half tank (50%) after only 285 miles at 9 MPG. After 460 miles I was at 25%.
On another trip the Freight Liner LCD Information Center showed a low fuel alert (10%) after traveling 482 miles after a fill up. I don't recall the VMS reading in this case. I was fairly sure I was not that low but filled in any case. 56 gallons filled it up. I'm not sure if the Freight Liner LCD is still receiving the proper info after the Glass Dash install.
I never noticed any problems with the old analog fuel gauge. Our fuel tank is rated as 150 gallons. I'm guessing that even when I fill up I may not be have a full 150 gallons in the tank so I rated the tank at 140 gallons. Should I tell the VMS a number other than 150?
Here's what my Fuel Tank config looks like.
Thanks for your help.