I filled up today, reset the trip counter and drove off. As I have been towing the jetskis the last few days I wanted to check kind of mileage I am getting and I noticed that miles to E only read 117. Reset the trip counter at 1 mile and checked again now 116. Drove for a little bit and then stopped shut her off and restarted 116 but as I was driving it moved to 179 then to 2 something. I let it sit in the drive for awhile and I just checked after I got back from taking some movies back and it reads like 326 way off. Plus the gas guage reads 3/4 tank. I was at 1/4 tank and put 21 gallons in.



Any thoughts should I disconnet the battery for a reset?

D&*$!!! if I pay this much for a truck and guages are going crazy already.

Thanks for the help

 

I'm no expert here, but this could be explained by the onboard computer using fuel tank level divided by current average fuel mileage. If you got the 116/117 readings while sitting still the fuel mileage would be 0 mpg. Try watching the average MPG while at a red light it drops fairly quick while averaging in the current 0 mpg. This would also explain why the miles to empty would increase when you drove and increased the current MPG averaged into the equation.

Like I said I'm no expert and this is just a hypothesis

 

Well it made it up to F today after I got back in off the water. I am going to give it this tank and see if it happens again.

 

It's a snapshot in time and an average of those snapshots...

In short, if consumption is up, MPG's or MTE's will be down... if the fuel consumption at that snapshot in time is down, the MPGs left will be up...

My hunch is that, when you reset it, it's resetting your MTE as well and thus starting with much fewer snapshots in time to figure into the average.

 

The float on the sender in the fuel tank may be hanging up, playing with your gauges. You didn't leave the key on by any chance as you were filling up? This can cause delayed reaction of the fuel gauge.

In regards to the DTE thingy, normally mine registers somewhere in the 420-440 miles to empty range. If I go to Texas, running 80+ mph most of the way, by the time I get back and fill up, it'll read about 340-350 miles to empty, unless I go in with my PDS and reset the keep alive memory and drive it to where adaptive strategy kicks in and relearns my "normal" driving habits, or if I drive it for a couple tanks to let it relearn itself.