Since I have gotten my new cams and TB, Crower 404's and bored out stock from Maxbore(64mm), my car has idled crazy, going from 800rpm to 1600 rpm! Before this it idled smooth with my Crower 403's and stock TB! I dont know what is wrong I have adjusted the Throttle cable and i still idles funny and i have aslo tried adjusting the idle screw and nothing changes it! Someone help me out!

 

does it repeatedly go up and down or just every once in a while? if it is doing it constantly it sounds like it is probably a vaccum leak somewhere. i would inspect all the vaccum hoses and then go from there. if that doesn't work you may want to look at the fitv (fast idle thermo valve), sometimes they get gummed up, if it is stuck it could also cause this problem.

 

I think that this is it b/c I checked it out last night and with the car warmed up the FITV still had suction, which it shouldn't!