Long term fuel trim numbers

[Gordy]

My long term fuel trim is always 25 at idle. I know this is not normal. Any ideas as to what may be the cause of high LTFT numbers.


My milage sucks at 11 mpg for a 5.3 liter. It runs fine did plugs wires cleaned erg valve etc.

Sometimes it throws a code bank one, and 2 lean which I know is probably the intake gasket, but it only does it once ion a while when its cold out.

Gordy

 

[ATL]

hmmm... wonder if thats something my scanner can tell me. ill go look real quick...

---------- Post added at 07:12 PM ---------- Previous post was at 07:06 PM ----------

im showing 10.94 bank 1 and 14.06 bank 2, at idle. but im not sure what would cause the difference. what program are you pullig the fuel trim with? is there anyway you can post a screen shot of all your values? we can compare them to mine, i have an scantool elm 5 and it shows like 20 values

 

[Gordy]

Fuel trim

Using an Actron scanner.

The hoe usually sits but been driving it to work for a week, and half now so I have been hooking up the scanner on the highway, and it seems ltft is usually +25%.


I just took a jaunt after my post, and I was running + 10ishs LTFT. STFT always seems normal.


Gordy

 

[ATL]

my stft is realtime and its up and down, all over the place. i wonder what would cause the change in ltft's. and why are my banks ltft's different?