I have a 1997 Jeep Wrangler TJ 4 cylinder and when it's idling or in neutral while driving, my RPMs run high, around 2,000-2,500. My gas mileage has become a joke and I have no idea what to do.

I have a 1997 Jeep Wrangler TJ 4 cylinder and when it’s idling or in neutral while driving, my RPMs run high, around 2,000-2,500. My gas mileage has become a joke and I have no idea what to do.

I have a 1997 Jeep Wrangler TJ 4 cylinder and when it's idling or in neutral while driving, my RPMs run high, around 2,000-2,500. My gas mileage has become a joke and I have no idea what to do.

There are so many things that can be wrong. The best place to start is to have a computer diagnostic machine hooked up to the vehicle and scan for codes.  

It may be a simple O2 sensor but, it could be more involved however, we need more information to help you get more answers.

Gerald Wheelus
Edgewood Auto Parts #253
Edgewood, Texas

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