You can always check the throttle linkage. Remove the air cleaner and have a friend pump the gas pedal- you'll see the linkage moving. In the front there is a section that goes straight down. Take a 8 mm wrench and put it between the two linkages and twist- the lower one will then pop off- do the same to the bottom and then you have a short linkage section about 4 inches long. If you hold the end with pliers you can take the 8mm wrench and spin the lock nut down and then rotate the ball end. Making the whole section shorter will decrease the idle- making it longer will increase the idle. It only does so much- as the other controls will come into play. Idle is also a part of the fuel mixture. with the air cleaner off you can see the fuel distributor- which is what the air cleaner sits on. In the front of it is the mixture control- it's a 4.5mm allen wrench adjustment. Put the allen wrench into the hole and press down- it's spring loaded. By twisting either direction slowly you adjust fuel/air ratio I believe. This effects idle. So now you have about 5 different systems affecting idle. Oh- also is the warm up control- which is right next to the idle control valve. Tap on it a few times. It's designed to raise the idle just a bit when the engine is cold. While doing anthing tot he car be sure you know where you started with every change you make so you can set it back to where you started. YTou dont want to change a bunch of stuff and not be able to get back to the staring point- yo could really mess up how the engine runs and then you gotta spend alot of time or alot of $ to a pro to fix your F*&^up.