Join Date: Mar 2003
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Re: TJ mileage
The 97 was the first year of OBD II so the on- off- on- off thing doesnt work, go to autozone for a free diagnostic.
as for the mileage, its all how you drive it!!! I live in Michigan and the speed suggestion is 70mph, which means if you go slower than 75, you get run over. Well, most of my driving on road is on the highway, those four angry squirels under the hood want lots of go juice when you work the engine that hard. I am lucky to get 18mpg. That is stock. Not good. I run a K&N air filter too. The people I know here with 4.0's get roughly 14-15 mpg. There are MANY factors that affect fuel economy.
How much ethanol does your state require in the gasoline, temperature, etc.....