Question about Jeep Cherokee

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I have recently bought a Jeep Cherokee 2.4 Sport petrol (2005) and believe that the fuel consumption is excessive. It was serviced and MOTd from a reputable company on purchase but I only average 352 miles per tank - 17 mpg. The pick up speed also seems sluggish but actually drives very well. I have carried out all the normal checks for leaks etc and am now completely stumped. I am reluctant to put it straight to a Jeep dealer and be charged a fortune for it. Any help or ideas would be appreciated.

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Unless you have an engine light on, the first thing I would check is tire pressure. You should run at least 35 psi. Tire size can make a big difference also, smaller is better. If you have very large off-road tires, you will pay for poor rolling resistance. Use skinny, tall tires for better mileage. The other obvious item would be the air filter, make sure it is new every 10,000 miles. The computer is programmed to deliver fuel for an expected amount of air delivery, if the air can't get through, it will run rich and get poor mileage and performance.

Posted on Sep 08, 2010


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