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Scangauge reads .08 GPH when ICE is off
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04-17-2008, 01:52 PM
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Senior Member
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Join Date: Mar 2008
Vehicles: 1997 Saturn SW2
Location: Massachusetts
Posts: 208
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Scangauge reads .08 GPH when ICE is off
I'm not sure if this is just a calibration issue... shouldn't gph read 0.0 when the engine is off no matter if the SGII is calibrated or not? I haven't gone through enough gas to accurately calibrate it yet but I'm confused as to why it would show that. Is that normal?
EDIT: I mean't .08 gph 
Last edited by mintsk8er : 04-17-2008 at 02:37 PM.
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04-17-2008, 02:04 PM
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Senior Member
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Join Date: Aug 2007
Vehicles: 2005 Ford Escape Hybrid
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Re: Scangauge reads .8 GPH when ICE is off
It may be that the car is no longer sending data and the 0.8GPH is the last value that was received. My FEH key must be in the RUN position to get any data from the network.
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04-17-2008, 02:05 PM
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Electromagnetic Wave [:-h
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Join Date: Jan 2008
Vehicles: 2002 Toyota Celica GT-S/6 1996 Toyota Avalon XLS
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Re: Scangauge reads .8 GPH when ICE is off
It will read the last valid value out of the ECM, in many cases.
Yep, normal.
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04-17-2008, 02:09 PM
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Senior Member
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Join Date: Mar 2008
Vehicles: 1997 Saturn SW2
Location: Massachusetts
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Re: Scangauge reads .8 GPH when ICE is off
Ok, sounds reassuring I suppose, but my idle gph with the enigne on is always above .32 gph sometimes in the .4x range. Doesn't that sound high for a Saturn?
Quote:
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Originally Posted by CarlD
My FEH key must be in the RUN position to get any data from the network.
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One other thing: When I'm in a fas (with the key in "run" position), it stays at .08 gph also... which means my MPG is some where in the 400's or so at around 35 mph, shouldn't it be going up to the max (9999 mpg)?
Last edited by mintsk8er : 04-17-2008 at 02:37 PM.
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04-17-2008, 02:14 PM
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Senior Member
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Join Date: Mar 2008
Vehicles: 1997 Saturn SW2
Location: Massachusetts
Posts: 208
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Re: Scangauge reads .8 GPH when ICE is off
Quote:
Originally Posted by CarlD
It may be that the car is no longer sending data and the 0.8GPH is the last value that was received. My FEH key must be in the RUN position to get any data from the network.
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Actually, you know what, thats impossible because it read .08 gph when I first plugged it in to the car before I even turned it on. So theres no way it could have been notified by the enigine of a "previous value". Unless of course my car's computer is outputting the previous value from it's memory... any ideas?
Last edited by mintsk8er : 04-17-2008 at 02:38 PM.
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04-17-2008, 02:28 PM
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Beat The System
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Join Date: Jan 2007
Vehicles: 2009 Fit, 2004 Odyssey, 96 Civic retired
Location: Longview, TX
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Re: Scangauge reads .8 GPH when ICE is off
Something is way wrong here. I'm not sure I can get my GPH that high if I try. Double-check all the settings - engine size, speed offset, fillup offset, fuel cut threshhold... You might do best to restore defaults and re-setup everything.
__________________
Andrew
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100 mpg commute / 90.2 mpg tank = 1191 miles
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04-17-2008, 02:32 PM
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Senior Member
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Join Date: Mar 2008
Vehicles: 1997 Saturn SW2
Location: Massachusetts
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Re: Scangauge reads .8 GPH when ICE is off
ok hold up here. I think it's .08.... not .8 sorry.
And .32 - .4x
lemme change that...
But, still I think somethings not right. Sorry for that mistake, I've probably confused everyone by now.
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04-17-2008, 02:50 PM
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Beat The System
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Re: Scangauge reads .8 GPH when ICE is off
Ah, that's normal, then. Mine reads .3 and sometimes .2 when warmed up.
Check the DFCO cutoff point, maybe. My sg is older and doesn't have that, so I can't be sure.
__________________
Andrew
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100 mpg commute / 90.2 mpg tank = 1191 miles
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04-17-2008, 03:07 PM
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Senior Member
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Join Date: Mar 2008
Vehicles: 1997 Saturn SW2
Location: Massachusetts
Posts: 208
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Re: Scangauge reads .8 GPH when ICE is off
I don't know if my car has dfco. Would someone else know if a 97 sw2 does? When I take my foot off the gas pedal gph remains at about what my idle fuel consumption is.
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04-17-2008, 03:21 PM
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Beat The System
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Join Date: Jan 2007
Vehicles: 2009 Fit, 2004 Odyssey, 96 Civic retired
Location: Longview, TX
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Re: Scangauge reads .8 GPH when ICE is off
2 things going on: Does your car have DFCO, and how is the SG reporting it. At best, it's just reporting an estimate.
First one - Do a coast-down test in gear with the ignition on. Then repeat the same test in gear with the ignition off - leave it off. If the results are similar, you do have Decel Fuel Cutoff. If the ign-on coasts farther, it's still injecting fuel.
Second: check the Scangauge manual for adjusting how it reports this.
__________________
Andrew
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100 mpg commute / 90.2 mpg tank = 1191 miles
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