96' grand Cherokee mileage

Well, you dont post any modifications you might have made to it, so in more or less order of probability try these:

1. Remove the 10 pounds of lead from your right shoe.

1. Unlatch the parking brake.

2. Catch the neighborhood kid siphoning all your gas.

1. Try driving downwind/downhill every now and then.

2. Take it out of low range.

Something is seriously wrong.

I would try to get the diagnostic codes to see what the computer thinks is wrong, Yes, something 'is' wrong.

A dead O2 sensor can cause this, but this should also set a code.

Mike

Have you tried the usual suspects yet, plugs, wires, rotor, cap, air cleaner? Air up your tires, check everything. I had a '97 Ram Van three quarter ton with this engine and it got way better mileage than that. What kind of 4wd system do you have? Do you think something could be wrong in the transmission or transfer box?

Earle

Uh, fixing it would be a good start.