racermp

hey all. just bought a 96 4runner SR5 2WD V6 with 145k about a week ago. i've gone thru 2 tank fulls.

first time i filled up at 180 miles to 11 gallons (16.25 mpg)

then today i filled up 205 miles to 13.5 gallons (15.2 mpg)


after the first tank, i cleaned the throttle body, maf, put seafoam in the tank. it ran smoother. but my mpg is still bad. actually got worse. i drove about 70% freeway at 65-70 miles per hour.

is this normal?

i see other threads where ppl are getting 18-20 mpg.

what is the normal amount of miles driven to the tank fillup that you guys are getting?

thanks for any input

edit: it's all stock, no mods, 225 70 15 tires. 35 psi all around. it's auto 2wd

904_runner

well more info is needed.

auto? standard trans?

has it had a tune up?
stock? or lifted?
bigger tires?

racermp

oh sorry, it's all stock 225 70 15 tires. 35 psi all around. it's auto and 2wd. i'm editing the original post with this info.


i donno if it has had a tuneup. i just bought it from a dealer. it has had a new timing belt installed at 130. so i'm assuming the previous owner did do maintinance on it.

Elton

ehh that's terrible i would start off with a basic tune up

904_runner

yea regardless of if a dealer had it, i would at least, do plugs, oil, filter, fuel filter, air filter, etc....

my mom has a 99' 2wd limited 4runner with the 3.4, auto and with 267/75/16's i believe she gets between 18-20mpg city.

MillerPKA

don't feel bad i get a little under 13

904_runner

What?

Wow

Elton

i get like 22mpg if that makes you feel better

1stgen4gunner

what is your idle speed?

racermp

thanks all. yes rubbing in the 22mpg makes me feel better...................NOT. hahha i wish i could get that. our cars only weight 3500 lb's for the 2wd v6. so atleast 18 should be possible for a 3.4.


i stay under 2500 rpm in city. usually 2200 at shifting (auto box)


idle is like 600-700 or so with a/c off. jumps up 100 rpm or so with a/c on

yea i'm gonna do plugs and fuel filter next. airfilter seems recently changed. and i'll do an oil change this weekend.

think maybe it's the O2's? which ones usually get slow and give bad mpg?

thank you all

Elton

make sure you use denso or ngk dual ground plugs same goes for the wires also i might add i have free flow magnaflow muffler a true flow air filter isr and deck plate mod so she breathes a little better

hotlavaaaa

I have the same specs(my tires are around 31 psi) and I get 18.5 mpg usually from 50/50 driving. Straight highway driving I can usually get 22-23 mpg. Only "mod" is a removed airbox elbow.

racermp

i'll be happy with 18. i'm gonna do some mods on the airbax. the deck plate and maybe elbow. i don't wanna make it loud so i'm gonna stick with stock exhaust.

anyone know if should i change the front or rear o2 for gas mileage?

thanks

crolison

sounds not right, my friend has a 97 2wd with 265/70's and she gets 20mpg.

Right now i am getting 20-22mpg

Greg_Canada

I get anywhere from 18-20.5mpg in my 99' 4runner 4wd ltd v6 auto (heaviest slowest one they made) with 265/75/16's (bigger than stock).
Yes, there is something wrong with yours.

racermp

i'll prolly chnge my diff fluid also to see if it helps

SoCalPaul

I have a 96 V6 4WD limited, 125,000 miles. (I got mine about 3 months ago) I get around 17 mpg. I read a thread where people had good results from changing the fuel filter, I'm going to do mine tonight. Things that adversely affect mpg: Bad O2 sensor, dirty fuel filter, air filter, plugs, wires, pcv, etc.
Good luck,
Paul

racermp

yea i'm gonna try workin on it on sat. do we have plug wires? i thought we had coil packs on each plug

SoCalPaul

I'll find out when I do my plugs!!!!

Paul

Greg_Canada

I've noticed (i have over 155,000miles on mine) (i run mobil 1) that when i get over 5000miles to an oil change, my mpg goes down 2mpg. right back up when i change the oil....