Steve: after you get the throttle body off, etc., go to the opening on the engine, look in the bottom, and poke something like the long red spray tube from WD40, etc., into the small hole at the bottom, just to make sure that it, too, is not clogged. My mech uses 'GumCutter, sprays it on, uses nylon brush to smoosh it around, sprays more on to clean the crud off-and-out, then blasts it dry with compressed air. Lookin' good! -PD.-