Bad gas milage?

[4Runner]

Well my girlfriend bought a 98 Tacoma about two months ago. When we first got it it was getting about thirteen now it's getting about sixteen to seventeen around town. We drove to Idaho and got fifteen. The truck has a three and a half inch lift with the 3.4 and two eighty five. And has a exhaust on it. My 4runner has the 3.0 with thirty fives and gets better gas milage I don't understand how the 3 slow is better. Any one else have this problem?

 

[4Runner]

Can this be fixed with re gearing it?

 

[Spork]

if you are running 285's on it that is about a 33" tire, I know my old tacoma came with a 225 tire on it which is about a 28" tire so you may only think you are getting 13mpg but you might actually be driving closer to 20miles per gallon.

Do you know what gear ratio you have? I think it would help to regear unless you got lucky and got 4.56 ratio stock. If you have the 3.85 gear ratio I'd be amazed you were getting 13mpg.

 

[UFAB]

Might have something to do with 15% ethanol in the gas these days.

 

[4Runner]

Im not sure what it has on gears but I know it's not 4.56. It's way to high to be that low. When I'm on the free way doing seventy it sits at about 2300 rpm I think. I don't drive it a lot but that's about what I remember

 

[Spork]

Im not sure what it has on gears but I know it's not 4.56. It's way to high to be that low. When I'm on the free way doing seventy it sits at about 2300 rpm I think. I don't drive it a lot but that's about what I remember

Have you ever had a GPS to determine how far off the speedometer is off?

 

[4Runner]

No I haven't I have a ap for my phone I don't know how good it is but I haven't even thought of using it