Oh, OK. The one you adjusted is one of those DON'T TOUCH kind of things.
There is a large screw with a spring under it that sticks out the
left side (driver's) of the throttle body, that is the idle speed adjusting screw.
You will need to re-adjust the stop plate screw to factory settings, I don't remember what the factory setting is off the top of my head but it is an important setting. Once you get that set correctly, use the bypass screw to adjust the idle.
One more thing to check, after you get everything set, make sure you are getting full throttle. Lots of times the bushings or linkage gets worn or loose on these cars and the throttle body will only open 3/4 of the way. If that is the case with your car you will get plenty of extra free horsepower by getting rid of the slack and you will owe me a beer
