Sea Foam is a multipurose engine cleaner. You can get it a auto parts stores. To clean the cylinder and valves you can put it in the gas tank. You can also put it in the oil or even inject it into the intake manifold with the engine running via a vacuum port.

1995 4Runner Limited V6 3.4 Liter 5 Speed 4x4
1995 4Runner V6 Auto 2WD