06GMC4X4

iTrader: (1)

I have EFIlive (haven't used it for anything but changing tire size so far) but I wanted to try to get some MPG's from my truck. All the gas stations around me have gone to 10% ethanol and I'm lucky to get 10mpg now. I just enabled lean cruise and drove around some and according to the DIC on the truck it seems to help, but I noticed it leaned out everything all across the board not just at cruising. If I understand correctly changing B3618 I can correct my WOT. What do I need to change to richen up everything else, so that I'm not getting to lean when I'm towing? Thanks for the help.

smokeshow

iTrader: (16)

I'm not an EFI Live user, so I'm not familiar with your table names. What does the B3618 table control?

GMCtrk

iTrader: (27)

Lean Cruise should only be active at very certain loads. In other words, it has a small range that it will work within. Outside of that, it should not affect your fueling at all.

06GMC4X4

iTrader: (1)

I logged my truck at cruising speed from 50-70mph then only populated the cells that were in that range. It put me in the rpm range of 1600-2400. But after the reflash my AFR leans out around 16.5 when cruising, under moderate acceleration it only goes to around 13.9 used to be about 12.5, and WOT is around 13 now when it used to be 11.5.

06GMC4X4

iTrader: (1)

B3618 is the PE modifier based on rpm

06GMC4X4

iTrader: (1)

Another thing I have noticed is that after doing the reflash the place I was using to get power for my LC-1 lost power (using a spot under the dash where the factory harness runs to for trailer brakes, etc), not sure if the reflash had something to do with that. Another thing I did was put my old tune back on the truck with lean cruise disabled. From what I understand DFCO should cut off fuel when you back off the gas and the AFR should max out, well my truck doesn't do that anymore. Anyone else ran into this problem, I'm just want to get things back the way they were.

GMCtrk

iTrader: (27)

Are you actually using the real lean cruise patch or are you doing pseudo lean cruise by modifing the VE table?

06GMC4X4

iTrader: (1)

Using the real lean cruise patch

06GMC4X4

iTrader: (1)

Here is the tune I was running and the lean cruise tune I tried.