I have a 2001 Toyota 4runner, v6, with approx. 69,000. miles. Recently it has occassionally started stalling when started and put into drive. As we shift back to park through neutral, it will restart itself while making a whining noise. The check engine light does not come on. We have replaced the fuel filter, air filter, cleaned the injectors with expensive cleaner, cleaned the mass air flow sensor and then took it to the dealership. They couldn't get any codes either, and cleaned the mass air flow sensor again. HELP!