stev-o

My 89 just seems like it's tanking fuel. I have replaced cap rotor, plugs,etc all the $hit I have it running great but I drive 11miles to work and 11miles home and it'll take me 1/4 tank like wtf that seems horrible to me what can I replace to get better gas milage. I have a 4in lift with 32s And I've replace a few things like nss cleaning,cap
rotor,plugs,ignition components etc... just want better gas mileage with out doing injectors And all that stuff
any advice would be great

stev-o

Anyone

BrickBrizzle

I have an 88 i havent figured out what im getting for gas mileage.. I do intend to Get it soon tho.. Ill reset the tripo next time i get gas and let you know.. Im sure its not any better than yours tho

stev-o

Just seems horrible to me

stev-o

Feels like if I take it off roading I'll be empty by the time I get down into the trails

BrickBrizzle

I need to clean my tb and iac to see if it fixes my idle but its been raw out.. Waiting on the weather to warm up so shes been neglected.. I should get that fixed before i try to figure out my gas mileage.. Im sure its not helping mine

BrickBrizzle

Yeah mine doesnt seem that bad.. I dunno tho

stev-o

mine feels like it's literally tanking fuel and it never seemed that bad before.

BrickBrizzle

You arent leaking it are you? Does she smell like shes running rich?

zebvance

I have the same set up on a 88 Mj. I get about 11 or so around city, and this past weekend I got 7mpg on a full tank of gas on the beach. not sure what I get on straight highway though, I would guess about 14...

stev-o

I'm not leaking and it could be running rich what could help a new 02sensor

XJdryva

Throw a HO motor in there. I get 20mpg driving like I stole it

BrickBrizzle

I really wish i could tell you.. I believe a loose or leakin manifold can really effect your gas mileage? Are you sure you are getting 11 mpg? Do You have a place you can mount some gas cans on the exterior? Not sure about laws with those but if ur concerned about running out in the on the trails it may ease your mind knowing you got spare fuel

Monster Mopar

Yea, that is definately bad mpg. last time I measured I drove about 165 miles and averaged something like 16 mpg.

I'm running 35" tires, 5.5" lift, 4:56 gears, auto, and a winch and winch bumper, plus i had a few hundred pounds of gear in the back for doing some tricky tree removal and a large mountain pass to go over.

Not really sure what could be your problem, but:
Are you sure your gauge is reading right?
Is it getting up to opperating temperature? I'm pretty sure the renix will get bad milage if it runs to cold.
Look into the O2 sensor and the exahaust system. If there manifold is cracked before the 02 sensor it screws with the mpg. This is because it thinks the engine is running lean since your exhaust gasses aren't reaching the sensor, so it richens it up.
MAP sensor working?

stev-o

It's getting up to temp just fine and the map sensor is fine I hope to God I don't have a cracked manifold but I'm sure I don't
So would replacing the 02sensor help