'08 Truck, mileage tuning

[LS1408]

Has anyone done any fuel mileage tuning on the new trucks with Active Fuel Management?

[EC_Tune]

Yeah there are a few threads here already. Might want to peruse them.

[LS1408]

I did a search, and didn't seem to come up with that much. Any help with some key words to search?

Thanks

[Penguin]

here is one:

http://www.hptuners.com/forum/showth...&highlight=dod

and another

http://www.hptuners.com/forum/showthread.php?t=15872

Also, if you wish I could send you my tune via e-mail but in a nutshell upped the TPS max to 15%, TPS max hyst to 1%, bumped up the timing on the high octane dod charts, and dropped the vacuum for enable and disable. Getting 12.5L/100km (about 19mpg us gallons) all in the city with lots of cold starts and several full throttle runs too. It will hold V4 on roads that used to switch back and forth a fair bit. I'm also fairly high altitude too (3500ft) so that helps. Big thing is every truck is different and for me personally I did not want to feel it switch...better gains are possible I'm sure but it gets kinda jerky and that can't be good. Wish i could get it to hold v4 on the highway but these things just push too much air...