MPH/MPG messed up?

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Jammin_Quack
Posts: 64
Joined: Thu Jul 08, 2010 6:28 pm
Car: 2009 Nissan Altima Sedan

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yes i understand this is the Altima engine driving & tuning topic but i figured since MPH/MPG deals with the engine it would be okay :crazy: I have no idea why it took me a while to ask/post this up but before i swapped out my halogen lights to HID I disconnected the neg from the battery. now when i did that it resetted my whole ecu and now my fuel gauge is messed up. my MPG is 18.7 and my MPH is 13.3 :wtf2: ...can anyone help me out here?.....


QR25DE
Posts: 1363
Joined: Fri Apr 17, 2009 2:50 pm
Car: 2009 Altima Coupe 2.5L 6MT Turbo

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Fuel gauge is messed up? Please be specific.

Also the MPG/MPH is an average. The more you drive the more this will be spot on over time. How long have you experienced this?

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rcboy514
Posts: 1354
Joined: Wed Feb 06, 2008 10:39 am
Car: 2013 VW Golf TDI 4dr 6-speed
2008 A/C 3.5 CVT (sold)
2004 BMW 545i V8 >:-)
1991 BMW 535i I-6

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every time you take off the neg batt wire it will reset all the trip/mpg/mph,radio stations...etc. Nothing to worry about, it will eventually go back the way it was the more you drive.

As for the fuel gauge, do you mean the actual gauge that shows how much fuel you have left or just the mpg computer?


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