2007 Toyota 4Runner Q&A
2007 Toyota 4Runner Question: Fuel System Cleaning
The fuel injector cleaner used for a "fuel system cleaning" is more concentrated than what you would put in your fuel tank. What you are putting in your fuel tank is very effective as preventive maintenance. Occasionally adding fuel injector cleaner to your fuel tank is a good way to keep deposits from building up on the injectors and intake valves. If your 2007 Toyota 4Runner is running well I would see no need to pay for a "fuel system cleaning". - Oakman
2002 toyota 4runner with supercharger needs fuel system cleaned up due to bad tank of gas.
I've already replaced the water pump and the timing belt. My truck is not a 4X.