mpg calc on dash all over the place now, normal?
#1
07-14-2010 | 01:07 AM
Thread Starter
|
Senior Member
Joined: Oct 2007
Posts: 1,403
Likes: 0
From: Ny
mpg calc on dash all over the place now, normal?
Put my first tank of gas in the truck, cleared and reset the avg mpg calc on the dash. Originally for the first tank it would be pretty constant, with bigger fluctuations only really happening when going from highway to street driving for example.
Now Its like instant mpg reader all the sudden.. For example Driving straight down the road might read 16mpg, slow down to stop sign jumps to 18mpg at the stop. Hit the gas (slowly) from the stop sign to get moving again instantly drop to like 10mpg, go straight again jumps up to 16, slow down 18 and so on and so forth. First tank of gas i maybe saw a .5 mpg increase or decrease in the reading if anything. I drove 650 miles or so on first tank (give or take) and the readr only made huge jumps when going on highway speeds to street driving and so on, other wise always pretty constant..
Do I have an issue to get fixed? Possible something screwed up when i reset it? Or what, its irritating the **** out of me now.
Now Its like instant mpg reader all the sudden.. For example Driving straight down the road might read 16mpg, slow down to stop sign jumps to 18mpg at the stop. Hit the gas (slowly) from the stop sign to get moving again instantly drop to like 10mpg, go straight again jumps up to 16, slow down 18 and so on and so forth. First tank of gas i maybe saw a .5 mpg increase or decrease in the reading if anything. I drove 650 miles or so on first tank (give or take) and the readr only made huge jumps when going on highway speeds to street driving and so on, other wise always pretty constant..
Do I have an issue to get fixed? Possible something screwed up when i reset it? Or what, its irritating the **** out of me now.
#2
07-14-2010 | 01:56 AM
Senior Member
Joined: Jun 2010
Posts: 227
Likes: 0
From: Houston, TX
Put my first tank of gas in the truck, cleared and reset the avg mpg calc on the dash. Originally for the first tank it would be pretty constant, with bigger fluctuations only really happening when going from highway to street driving for example.
Now Its like instant mpg reader all the sudden.. For example Driving straight down the road might read 16mpg, slow down to stop sign jumps to 18mpg at the stop. Hit the gas (slowly) from the stop sign to get moving again instantly drop to like 10mpg, go straight again jumps up to 16, slow down 18 and so on and so forth. First tank of gas i maybe saw a .5 mpg increase or decrease in the reading if anything. I drove 650 miles or so on first tank (give or take) and the readr only made huge jumps when going on highway speeds to street driving and so on, other wise always pretty constant..
Do I have an issue to get fixed? Possible something screwed up when i reset it? Or what, its irritating the **** out of me now.
Now Its like instant mpg reader all the sudden.. For example Driving straight down the road might read 16mpg, slow down to stop sign jumps to 18mpg at the stop. Hit the gas (slowly) from the stop sign to get moving again instantly drop to like 10mpg, go straight again jumps up to 16, slow down 18 and so on and so forth. First tank of gas i maybe saw a .5 mpg increase or decrease in the reading if anything. I drove 650 miles or so on first tank (give or take) and the readr only made huge jumps when going on highway speeds to street driving and so on, other wise always pretty constant..
Do I have an issue to get fixed? Possible something screwed up when i reset it? Or what, its irritating the **** out of me now.
Haha exact same thing happened to me and Im curious as of why also.
#3
07-14-2010 | 02:05 AM
Member
Joined: Nov 2005
Posts: 68
Likes: 0
From: TEXAS
Sounds to me that as been that you just reset you AVERAGE MPG your average will change dramaticaly on the frist few miles run.. as you drive more the average should some how level to a mid point number.. greater distance travel v/s current gas consume.. i might be wrong but sounds logic to me..
#4
07-14-2010 | 09:30 AM
Technical Article Contributor
Joined: Jul 2009
Posts: 493
Likes: 0
From: Port Neches, Texas
Yeah, for the first 100 miles or so you will get changes all the time. As you get more miles on the tank it will take longer to change the average. This happens every time you reset the display. I reset mine one time while driving down the highway and it showed 30mpg for about 2 minutes. It was kinda cool, especially since I was going about 85mph.