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**1337** · May 8th, 01:08 PM

I have a 1990 Jeep Cherokee. 4 Wheel Drive, V6, 4.0 Liter... its a gas hog but a beast.

I'm wondering how I can make it more efficent. Mind you this is a 100 dollar car that is in very nice shape now, so I don't really mind dumping a little money into it.

I won't be seriously driving it until may next year, so I have a while to get it to my needs. I'm hopefully planning on fixing this car up really nice and somehow convinving my parents *cough* MOM *cough* to let me get like a Kawasaki 250 EX or 500 EX or something to start out on.

But what are some ways to get the gass efficency up? I think I'm getting like 12mpg city.

**Master of Paint** · May 8th, 01:24 PM

-Change the Air filter (K&N)
-Spark Plugs. Getting a weak spark will affect performace. These are usually a quick fix and should be done anyhow.
-Fuel filter (Many people neglect to get this replaced, and it can seriously rob mileage)
-Bad O2 sensor. (Running a bad one will give you false fuel/air mixture readings and give you horrible mileage) Signs of this include a rotten egg smell after idle, and a check engine light.
-Fuel Injectors. If your injectors are clogged and sticking, you could be losing mileage. See if you can pick up a new stock set.

And then theres always the things you do while driving that affect mileage:
*Dont drive aggressively, that eats up mileage
*Dont brake hard
*Make sure your tires are filled to the right psi
*If you have stuff piled in your car, take it out. Extra weight makes the car worse on gas.

After these fixes, you should definately see an improvement. Best thing is, all of this stuff can be done at home (maybe not the o2 sensor, dont know how easilly accessable it is to you.) and its relatively cheap.

**1337** · May 8th, 01:27 PM

I have all new spark plugs and wires.
Might get a K&N.
I was considering one of those chips that gives you extra fuel:air ratio and boosts HP and gives you a little better mpg.
Pretty sure my fuel injectors are good. I need a new gas tank and I can get one for free but fuel injectors are like 108 bucks at a junkyard.

**Master of Paint** · May 8th, 01:49 PM

Yeah check that fuel filter too, its like 12 dollars at Autozone, you can do that yourself (most likely depending on the location), and you'll be thanking me later.

**1337** · May 8th, 01:50 PM

Alrighty thanks man. I replaced the fuel filter on my pocket bike and WOW it sure did help.

**Ahmadi6490** · May 8th, 03:17 PM

Quote:

Originally Posted by 1337PAINTBALLER

Alrighty thanks man. I replaced the fuel filter on my pocket bike and WOW it sure did help.

Lol, what difference did ya see when you changed it?

**1337** · May 8th, 03:18 PM

My old one disenegrated or something so it started leaking gas. This one had better gas flow.

**Spudchucker** · May 9th, 09:42 AM

ive notice better fuel efficiency in my car since i got it, and i have done the following- CAI, plugs and wires, chopped exhaust, and a greddy header

so yea i bet those would help?

**HuNtS** · May 9th, 07:17 PM

on a jeep especially, make sure the tires are correctly inflated and the air filter is clean... i fixed those two on mine, and it made a helluva difference.. along with new spark plugs... and seriously, you think it hogs gas now... start driving aggressively with it, trust me it's so bad you wouldnt believe...i drove about 15 miles from a nearby city to my house, and driving it like a mad man, speeding, and doing burnouts, taking off fast, and just flooring it all the time, i went through a little less than a 1/4 tank... mind you i only have the 4 banger... with the 6 i'd think it'd be worse....

**Master of Paint** · May 9th, 08:57 PM

You could always get one of these too and "Supercharge" your car.

http://www.turbonator.com/

Seems like a mod worthy of Fire's Tercel.

**1337** · May 9th, 10:15 PM

My car could smoke fire's trecel.

**L1nUx_r0ot** · May 14th, 08:50 PM

i've gotten 30 miles on just under a 1/4 tank. ~6.6 mpg... I <3 my v8, but I hate it's gas milage combined with my aggressive driving habits. I guess it's up from 4.5mpg before I ran injector cleaner through it.

**No1TubaPlayer** · May 14th, 11:21 PM

"I purchased two Turbonators for my Chrysler Sebring and immediately noticed the increase in power. It was more than I expected. I am already noticing the improved gas mileage. I like them so much, I am ordering two more for my brothers. Now, it feels like my car has a turbo charger."

why 2?

**Snowsk5054** · May 15th, 11:23 AM

those things are dumb as hell! Its like those tornado things that supposedly increase gas mileage...when they dont do anything

**Ahmadi6490** · May 15th, 12:13 PM

Quote:

Originally Posted by No1TubaPlayer

"I purchased two Turbonators for my Chrysler Sebring and immediately noticed the increase in power. It was more than I expected. I am already noticing the improved gas mileage. I like them so much, I am ordering two more for my brothers. Now, it feels like my car has a turbo charger."

why 2?

Some cars can take up to 3 of them, others can only take 1 or 2. Adds about 35 horsepower.

**Master of Paint** · May 15th, 03:27 PM

Quote:

Originally Posted by Ahmadi6490

Some cars can take up to 3 of them, others can only take 1 or 2. Adds about 35 horsepower.

Doubt it...

Heres what it is:

They SAY that it has shown 35hp improvements in RARE CASES. These are probably cars that have the most restrictive intake system in the world, and after they free up that air, it makes all the difference. Well, a normal, well tuned car thats already getting good airflow will probably not benefit this much. Yes, maybe 2-5hp but nothing more. Definately not "turbocharged".

**crustybug** · May 22nd, 07:39 PM

you can buy a cold air intake, or you can also mill out your intake manifold or throttle body. spark plugs and wires will help as well. Make sure your catalytic converter is working properly as well. Another sheap fix is to clean your injectors out by the gas additive type. there are many easy things you can do, it just depends how much time you have to put into it. Drive it like a civilized human being as much as possible, until you want to show up some ricer lol.

**Ninja7** · May 23rd, 08:43 PM

drive slower, dont excellerate fast. try to stay under 3k rpm. make sure tires are infalted. change plugs and wires.