A bad catalyic converter will do a lot to diminish your gas milage. You might also have issues related to a "tune up" that include timing, a dirty air filter, dirty/worn spark plugs and other things.
The 2004 Wrangler 6 cylinder is a 4.0 liter.
The 6 cylinder engine in a 2004 Wrangler X is a 4.0 liter.
(2.5-liter, 120-hp inline-4) EPA 18 city/ 21 highway (4.0-liter, 190-hp inline-6) EPA 16 city/ 20 highway
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Horrible...thats's what it is. It needs about 18 - 22 Liter per 100km. Mine is an awd cargo. If you are looking for fuel efficiency...look at other vehicles.
Yes, there is a performance chip for a 95 wrangler with a 2.5 liter, it gives the wrangler more horse power and performance. You can purchase the chip at any automotive store or online.
The 2.5 liter four cylinder engine in a 1997 Jeep Wrangler has a timing CHAIN
check your air filter and your plugs , most common problem for lack of power and poor gas mileage
The 1988 Jeep Wrangler 4-wheel drive, 4 cylinder, 2.5 liter, 5-speed manual gets 16 miles per gallon in the city and 19 mpg on the highway. The combined fuel economy is 17 mpg.
It hav202HP for the 3.8 liter
You should not tow more than 2,000 pounds in a 1988 Jeep Wrangler. This is considering the engine is a 4.2 liter engine.