Where are the spark plugs at in a 1990 Lexus 400 LS?

You have to remove the black plastic cover that is in the center of the valve cover. 4 bolts the two you see and if you look at the black box part at the front of the valve cover you will see the other two bolts. Take all 4 bolts out, remove the black plastic cover and you will see the spark plug wires. Good You have to remove the black plastic cover that is in the center of the valve cover. 4 bolts the two you see and if you look at the black box part at the front of the valve cover you will see the other two bolts. Take all 4 bolts out, remove the black plastic cover and you will see the spark plug wires. Good