anyone got any insight on what could make my 2000 4.0 tj sudenly have no balls? i can hardly get it up over 30 mph going up hill. on the interstate its fine it just takes forever for it to get up to speed. i put in new spark plugs, air filter, i wanted to change that fuel filter but the guy at napa said 2000 tj doesnt have a fuel filter. but its running like a vehicle with a bad fuel filter. the guages are all fine and the dummy light isnt on. however the radiator fluid looks like poop water even though i flushed it like 2 months ago.