Best combo for improved MPG, less focus on all-out power

[mooose]

my tuck gets around 14.5 as it sits, nothing majour done to it, no cat no muffler modded air box, it shows its got a tune in it but not sure what it is, it was in the truck when i bought it, still governs out at 160, but she gets their pretty quick, i gonna do the pcv re rout, ive been wondering the ppe fuel fitting rail, wonder were & how to install it thanks

[txhunter21]

re route takes about 30 minutes and about $14 from lowes in parts very simple and the fitting takes about 1-2 hrs and a little bit of a pain, hardest part is getting to the tensioner belt bolt to loosen it and the other end of the fitting after the cp3 is off here are some videos and ppe will send u instructions when u buy the fitting.. LLY Duramax PCV Reroute - YouTube
DURAMAX PPE PORTED FUEL RAIL FITTING INSTALL - YouTube

[mooose]

thanks for the vid on both, that really helps, could i just drill the hole bigger or is it better to just buy the valve, is there a vid on doing the bottle test i havent found one, i think i understand just want to make sure i do it properly

[txhunter21]

um you can drill the hole bigger if you want but i js found it easier to buy a new one so i dont have to mess with exact hole size and i dont know about the video, its not bad to do either i did them on my own and im not the best mechanic

[Buddaorf]

Just an idea... If you look at my Sig... I went from 14 MPG to 17 MPG daily round town driving. I have got as high as 19 MPG driving KS hwy at 55 MPH.

EFI is your best bet and Rob does a Great Job?

Another thought is dropping Tire size help too. Running 265 75 16's would have gone with 245s but the wife said makes the truck look Gay lolo

[lddrew]

EFI from rob and do a transgo jr.

[mooose]

thanks for the vid txhunter21 it sure helped to see what i was looking for, i read on hear some where that someone drilled it out with a 5/32 drill bit, is it the one side or both sides

[rugbyman87]

I am totally happy with my EFI from kory willis. I recently got 22.2 mpg with my truck, cruise set at 65 on the highways with my 265 ATZ's on. With my 20"s and 305's i can hit 19 -20 if i set the cruise at 65. I also have more than enough power to tow whatever i want on my 30 or 60 hp tow tunes. Turbo brake helps out alot when slowing down a heavy load. I got 13.8 towing 9k at 72mph on my 30 hp tune as well.