Engine Mechanical problem
1999 Other Toyota Models 6 cyl Two Wheel Drive Automatic 101200 miles

Am da Toyota Owner . I own Toyota Chaser engine model JZX100. Which the fuel consuption was very nice but now its is eating my gas like da car is hungry. What was happening was .. I was washing da engine with water and Da engine was misfiring. I clear the misfiring by changing all the plugs in da unit. But the consuption is changine. If any body can help how I can fix my unit to the previous condition, Or if there is any component to reduce gas consuption and increase mileage this will be very much appreciate.

Thanks so much