haha how fast were you going? I drive my Jeep on a race track which was fun. Lol not fast though.

 

My commute is just over 50 miles, one way. I thought about that option, but then I did the math.

When gas was consistently over $3 per gallon, driving an econobox was going to save me a whopping $1000 per year.

And then there's additional insurance and maintenance. It's probably a break-even proposition.

 

Move your air temp sensor form your intake manifold to the air box doing this I had a 5 mpg increase highway and a 3 mpg increase city make sure to seal the original hole well, I used a brass plug 1/2" by 20 thread

 

Run on Propane!
Over here it costs me half as much as running on unleaded.

 

It's a taper pipe thread, dumbo!

Running on Propane works well, but it takes big bucks to get it certified over here. The system has to be installed by a certified technician and any repairs have to be made by a technician also. Actually the latest system is LNG (liquefied natural gas) although the system runs on compressed natural gas because carrying a liquefied gas bottle is considered too dangerous for the public because of the extremely high pressures involved. Currently there is only one place in my area to get your system filled and that's the local bus service garage. In order for natural gas to stay liquefied it must be below -259* F or it turns to CNG at around 3,600 psi so you'd be driving around with a bomb in your car.

Which brings around a point. Where do you mount a propane tank in your jeep?

 

After my last post, I did some research. It seems propane contains 2.5 times the BTU output of natural gas per cubic foot. It's also safer and easier to handle. There is also the fact of the infrastructure available to handle it. SO, even though natural gas is cheaper, it's less effective and more dangerous to handle. It seems natural gas at the wellhead contains methane, propane, butane and other lighter gases and is "cleaned up" so only methane comes out of your pipes at home., after the addition of mercaptan so you can smell leaks. 60% of propane is made from natural gas and the rest from distillation of crude oil. SO after the crude is gone, we'll still have propane to drive our jeeps! Provided the internal combustion engine survives that long! LOL!

 

lmao! i drive like a little old lady according to my wife and my mileage sucks big time, ave 10 to 12 mpg,

 

If your vehicle is stock, and you don't drive like a maniac, that mileage is telling you that you have something major wrong with your engine.

 

Been to several mech none could find any probs

 

Most mechanics these days can't diagnose anything more complicated than a flat tire.

 

unfortunately me either. I'd love to have or running right but afraid I'm have to sell it or trade it off. I can't afford excessive fuel cost. And already spent my extra on mechanics. (Fixed income)

 

proper plugs(which are probably champion copper) do not run the fancy ones. You will probably find the recommended plug on a sticker under the hood. take out the slack in the throttle cable. Finally, change your oil regularly.

 

Actually, since he's got a 99, I'm not sure. The later models were better served by the NGKs, but I'm not sure where the cutoff is. Maybe with the 2000 when the coil packs came in?

 

Yup! NGKs for waste spark ignition.

 

Already changed plugs to champio. And coil pack, fresh oil in it