Thats not true. I see people all the time that get 2-3 mpg better on a good tune compared to stock. It has to do with timing. One of the effects of advanced timing is an increase in MPG, and many tuners/modules/etc. feature advanced timing on their tunes. You can do it on you 12v, but its a little more complicated than pushing a button

 

i agree that timing will help with milage but ive tried to tune my afc and plate and never noticed milage gain the only milage gain i have seen is when my driving habbits changed

 

Well yeah on a 12v, of course theres not as much of a chance that you will improve mileage just by adjusting plate and AFC, you have more of a chance of dropping your mileage, depending on driving habits

Really no matter what you drive, and what kind of tuning you have, driving habits will have a major effect on your mileage. Bu they way you have your truck setup is also a major factor.

 

my truck is sooooo addicted to being plugged up i have to do it when its above 32f. its ridicolous. just dont plug it in too much

 

You got other issues bro if it wont start at 32 unplugged.......

 

you think its just the heater itself. my psd uses glow plugs. you think its that. not to hijack this thread.

 

Im no powerstroke guy but at work the n/a 7.3's and 6.9's wouldnt start unless we use the glow plugs....and thats even in the 40's an 50's during the spring. Although we also beat the **** outa them too and they certainly dont get the greatest maintenance so I'm sure theres something wrong.

 

the old 7.3 and 6.9 were IDI motors. There aint an IDI motor out there that will start at less than 130 degrees without the glowplugs or ether.... Or LOOOOTTTTSSSSSS of cranking. LOL

Nature of the beast.

As for smokeblower, I think you've either got a non-functioning grid heater setup, air leaks in your fuel system, somethin......

 

Yeah sounds like glow plugs.....

 

that or fuel related,
check to see if the grid heater is working,

ive been starting mine in -15 latley