ScangaugeII fuel fillup adjustment: 11.6%!

For those who got ScangaugeII, I've got a concern about the adjustment I've got to do with my fist fillups. To get the correct amount of fuel burned (when at fillup station you compare the ammount pump gave vs amount Scangauge recorded) I have to correct the value by an enormous +11.6%. I have already corrected the speed on my Scangauge with my GPS. I wonder if that means is my truck is running too rich or something.

How much % have you guys had to correct at fillups to get the correct value?

For those who wonder what I'm talking about, go read the manual.

 

Very little, The pump may read 16.3 and the scangauge may read 16.6 or 15.9, something like that. I have had a couple where I don't change it at all. It helps if you are very consistent with your driving.

 

too bad i cant afford a full tank sometimes so i gave up with that crap.. it kinda takes too long to adjust the gallons and percentage when its saying i just had a 4 gallon fill up

 

I went through the same thing at your age and gas was .65 to .70 per gallon and my gas tank at the time was 10 gallon's.

 

During the first few tanks you have to change it quite a bit. Once you hit about your third tank you should be good to go mine is normally about +or- .2 gallons on. which probably just has to do with the pump you are at.

 

The first several tanks I was adjusting mine a lot.....

It was the winter time and I was carrying 200lbs of sandbags in the bed. The scangauge just couldn't get 'settled'. When I took the sandbags out, the data was more accurate and now I very rarely change the fuel trim.

In the winter/summer it does vary a bit.

I started this thread a while back, not too many responses though.

http://www.tacomaworld.com/forum/general-automotive/49837-scangauge-peeps-whats-your-fuel-trim.html

 

I think mine is set to be adjusted about 9% so i wouldnt be too alarmed by 11%

 

Well I guess it might be normal then. At this setting Scangauge reads within .1-.2 liters from the pump.

 

I also have to adjust mine to around the same amount. To get it dialed in make sure you fill up at the same pump at least twice and then you can pretty much leave it alone. I have found if you keep adjusting it when going to different pumps you will always be chasing the correct setting.

 

I fillup at same gas station/same pump everytime! And off-topic a but, now that the weather is colder here, near freezing, I get lower mpg figures that's for sure. About 1-2 mpg less than when it was 15 celcius (about 60 F i guess).

 

During summer, I've been getting 18-20mpg. In the winter, I've seen 15-17mpg. Same driving style, no 'warmup' time, etc.

Winter here where I live is probably mostly in 20's-40's F. In January, you might see 0-20's F.

 

It takes a couple fill-ups for the SG to be precise with its numbers. Try to use the same pump every time you fill-up. My gauge is .1-.2 gallons off at times.

 

small update: my adjustement is now 14.X%! always filling at same pump. I hope it stop getting higher... maybe colder weather getting here affects the %?

 

Use Amsoil 0w-30. It will improve cold weather fuel economy by 6%. Start the engine and drive at -20, and it will rum smooth as silk.