A different approach that worked for me. I used B12 Throttle Body Cleaner. I located the vacuum line that runs from the Brake Master Cylinder to the Intake and disconnected the line at the master cylinder. Ran engine at a fairly high rpm and kept feeding the B12 through the system. To finish things off I cleaned the Mass Flow Air Sensor (MAF) with MAF Aerosol Cleaner. My engine runs beautifully and is very responsive ever since.