Poor gas milage, any ideas?
#16
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Year: 1997
Model: Cherokee
Engine: 4.0
When was your cooling system last maintained? It's important to stay on top of for the simple fact that XJ's are prone to overheating, but if your thermostat is shot in such a way that it isn't closing when it should, you could be running too cold which would be killing your efficiency, too.
#19
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Year: 1996
Model: Cherokee
Engine: 4.0
When was your cooling system last maintained? It's important to stay on top of for the simple fact that XJ's are prone to overheating, but if your thermostat is shot in such a way that it isn't closing when it should, you could be running too cold which would be killing your efficiency, too.
#21
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Miles per tank is meaningless.
It reflects an idea of what you mileage is, without doing the math, fill-up game.
I do understand it is not going to show the same thing as MPG. But that's like saying torque is meaningless in telling someone how powerful an engine is compared it's horsepower.
It's not even close to being comparable to torque vs. horsepower. Those are two very well defined measurements. They can be measured reliably, and understood by anyone who wants to take the time to do so. Furthermore, they have a direct relationship to each other.
The last two or three weeks my "miles per tank" has changed radically. I mean RADICALLY.
My MPG hasn't changed at all. I suspect my sending unit is going out, giving me false readings.
And that's only ONE of the unknown variables in the ignorant, "miles per tank" approach.
"Miles per tank" is code-speak for, "I have not the slightest clue what I'm talking about."
#23
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Year: 1993
Model: Cherokee(XJ)
Engine: 4.0 i six H.O.
did you test every sensor? according to the book? coolant temp on the stat housing, iac, map, all so mat sensor? I think? of course city driving kills milege. I got 400 miles out of mine a few times with just highway driving.
#24
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Year: 1999
Model: Cherokee
Engine: 4.0
"Yes, really. Well, unless you consider it worthwhile to think you have "an idea" when in fact, that "idea" is so unreliable that all it can really do is give you a false sense of security."
#25
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Miles per tank is meaningless. Fill your tank, drive, fill it again (preferably at the same pump), and divide miles between fills by the gallons pumped. Let us know if it is city, highway, or mixed. If I trusted my gas gauge to tell me when I've gone through a tank, I'd also think I was only getting 10 mpg. In reality, I get 18-19 mixed and as much as 21-22 highway right now.
^^^ You have to do it this way. Fill tank until pump turns off. Write down ODO. Drive a good number of miles (say 100), then pump gas again until it first turns off and use the # of gallons from the fuel pump. You can't go by "I filled the thank" and went XX miles and then "filled the tank" and went YY miles. The gauge isn't accurate enough. If you filled the tank until it shuts off and then drove until you ran out of gas, that might work but I don't think you want to run out of gas to see how far you can go.
I used my XJ to go to work for awhile but bought a 4CYL Toyota to commute. The XJ go about 2.5 days on a tank. The Toyota is usually 6 -7 days. Paying for itself in gas savings.
#26
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Year: 1996
Model: Cherokee
Engine: 4.0
thanks everyone for the info. i have some ideas as to what to look at next.
on a side note, i never should have gotten rid of my 95 corolla that thing could run on fumes for a few days if need be.
on a side note, i never should have gotten rid of my 95 corolla that thing could run on fumes for a few days if need be.
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