spencer150

i just got a 2000 5.4L F150 its my first truck. it has a 3 inch lift and im only running 31 inch tires. and its getting horrible mileage (about 10 mpg's ) i replaced the spark plugs, new air filter, and fuel filter and no difference.... the only performance mods is a magnaflow cat back exhaust... is there anything that i can do to get my mpg's up?? i've been looking at those IAT chips, im not sure if those really work... also a cold air intake. (but im on a budget) has anyone made there own??

any help would be much appreciated.

metropolis909

gotts mod should help.. but i gotta ask i get 14.5 avg have gotten 18 but im running 33`s with a 3.31 rear end.... how hard are you on the gas... do you like hearing ur exhaust? where you romp on it?

yngbld3

I just bought my 4.6 5 speed w 265 75 16 & bl , it took 14.5 gallons to fill & presently has 268 miles on it..I'm figuring I get a lil over 20 mpg up to 23 , but will divide gallons & miles to know for sure ! It does have a k&n sytem & a chip on it , @ least thas what he said..

2002FX4

Installing an electric fan could give a slight improvement.

spencer150

i am easy on the gas. i don't accelerate hard, and i drive conservatively.

2002FX4

Have you sprayed down the MAF sensor with MAF sensor cleaner? Something isn't jiving, that's horrible gas mileage.

spencer150

no i havnt.. actually i've never heard of it... my air filter was really dirty when i changed it.. could that mess up the MAF?? and yes its horrible mileage, i have no idea whats wrong, it sounds fine, idles fine, and accelerates smooth. and im even putting fuel additives in.. and nothings helping

NicksKR623

I'm getting around the same mileage, maybe 10-12...

DHGFX4

I get around 16mpg on 35's with 3:55's.

User_40026

how can I know if i got 35's with 3:55's. ?