on start up car goes from about 1500 up to about 2000 rpm and holds steady there. have had this happen before and just turned the car off and turned it back on and it went away. now its not going away. checked all my throttle linkage and everything is moving properly. unhooked the battery to reset computer, tried different chip, and still cant get idle to go down. any ideas?? i have not messed with anything or changed anything, drove the car the other day and had zero problems.