mochester

I've got a 92 4x4 pu with a 22re and 5 speed, 235/75 tires (only slightly larger than stock), stock 4.10 gears, a doug thorely header, and a cone air filter on it. it has new plugs, newer cap and rotor, brand new fuel filter, new o2 sensors, new catalytic converter, the list goes on.

on long highway trips, like one i recently took to bakersfield (up the grape vine, mind you, in 80-90 degree weather), it gets excellent mileage. Came out to 24 mpg average for the whole trip
but when it comes to city driving, it seems to get anywhere from 15-17 mpg, which i don't find satisfactory. i can be a little heavy on the pedal, but only when i need to be, because lets face it, sometimes when you only have 115 hp pushing a heavy 4x4, you need to wind that ▓▓▓▓ out to keep up with traffic. but aside from merging onto the freeway or going up a steep hill, i'm really easy on the gas, and yet my mileage in the city is still crap

this is a question for those of you who are getting 18-20 mpg out of their 22res in the city: how heavy do you go on the throttle? can you give it more throttle around town and get mileage as bad as mine? or should i suspect that something is wrong with my motor?

does anybody else experience such a drastic difference between their higway and city mileage?

thook

95% of the time I'm easy going on the throttle...especially stops and starts. I coast in neutral to stops and kind of allow the vehicle to "do it's thing" without "forcing it" on the start up. If anyone has a problem with it, if they want to go faster than me, they can slow down or pass me. I drive defensively and let others eat up the gas and/or have their bumper benders. Towing is a different story. Sometimes I really have to get on the throttle just to start out on an incline. Then, I see a dramatic drop in fuel economy. I'm en route to making some modifications to change that, though....regearing and eventually a heavy flywheel. In general, however, if something is going on with your motor to affect what your getting in town, it's also going to effect what you're getting on the highway. I think you just need to go easier on the throttle if you really want better mileage. You may be heavier on the throttle more than you think.

kahn

the headder may be a part of that. headers are great for high rpm power, but you lose some low end and some economy. or is this problem more recent than the header?

stock87

Sounds about right to me.

I have nearly the same setup as you, just carbureted.

Highway I get 22-27
Open country roads I get 19-20
Purely in-city I get 13-17

Greg_Canada

What type of o2 sensor is it? OEM or Bosch?
The mileage diff in my 99' 4runner is huge, 10l/100km hwy 14 city...

CyMoN

don't complain I get a strait 14 mpg

TORTIS

iTrader: (1)

I get 19-21 in town, 5spd 4x4 w/ LC Engineering header with stock exhaust, and same size tires as you have. I don't get much better on the highway 22-23 on a good day.

ewong

MPH has ALOT to do with the right foot.

Sounds about right to get 15mpg if you "have" to wind it out.

I you drive with "egg shells" under the gas pedal - you cna get 17-19 in the city. You'll have lots of people passing you and honkin tho..

thook

I say let 'em. Most of 'em are on their cell phones and not paying attention, anyways.

mochester

yeah i suppose you guys are right


i drove on this last tank like a 90 year old and got 19.2 mpg so i guess i have nothing to complain about

nobody honked, but everybody passes
it really kills on hills though...i don't feel like its really that much of an exaggeration to say i 'have to' wind it out up a hill...i mean i know, if i was stuck behind someone slowly creeping up to 40 mph and the speed limit is 50, and i had the power available to just fly past him really quick, i'd do it
there are lots of hills here...steep ones. and lots of soccer moms in big chevy suvs with lead feet

ozziesironmanoffroad

im with ya man, in the city i get about 16 to the gallon, and im not sure about on the highway, havent tested that yet. ill probably test that when i drive to san diego in a couple months. but hey dont be complainin, my old 66 chevy C10 350ci V8 3spd got 7 to the gallon on the HIGHWAY... so be grateful... hehe.

chroad

Sucking wind on hills is a fact of life with the 22r/re. I have no option but to deal with it, but my brother-in-law couldn't stand it and sold his 94 x-cab as a result, getting an F-150 instead. My truck is better maintained than his was, and that made a noticable difference between ours.

I'm getting about 16-17 city, 18 highway with 4.56 gears, 32" BFG's, stock engine, LC header, magnaflow cat, and Flowmaster 50. I keep thinking that I'm going to come upon something that will magically get me into that 21-22 range on highway, but I haven't found it yet.

ozziesironmanoffroad

get a hybrid engine, your MPG will jump to the mid 30s, low 40s. .

chroad

That would be an interesting writeup.

CoedNaked

What size exhaust do you have? Mandrel bent/pressure bent?

ozziesironmanoffroad

yeah, but i doubt that the truck would have much power...

chroad

2.25", and I honestly don't know about the bending. I had a shop do it for me as I don't have the tooling.

CoedNaked

If you had a shop do it for you it's more than likely pressure bent. If you look at the bends they will have reduced diameter compared to the straight sections. That is pressure bending or as some call it "crush" bending. Pressure bending is cheaper to do as most shops can do it. Mandrel bent pipes cost more to do, but they flow much better which in some cases means you can go down in exhaust sizes and save volume which helps low rpm hp but still flows well.

What are your cruising on the highway RPM's roughly? for example what RPM's at what speeds, those types of things? At what RPM's do you usually shift at around town?

neilan

in my 87 22re runner i have practically every sensor and part replaced on a motor wiht just over 5000 miles and only get 12-16 in town (under 40 mph the whole time) and over 20 on the freeway and country roads. I have noticed than unless you really baby your 22re when driving aorund town it can really suck gas.

ozziesironmanoffroad

are there a lot of red lights? if so, then thats probably it. stop and go is hell on mileage. and all new sensors and still 12-16 in the city with 5000 miles? that sounds like mine... dont be worried about it, its the city, where they let the idiots loose. what you expect?