Shot of the idle-up valve and the A/C VSV that turns on w/ A/C operation to boost idle speed. If you are having trouble with the idle-up valve not working, make sure all the vacuum lines and ports are open. To test the idle-up valve, bypass the VSV by connecting the vacuum line that feeds the VSV from the intake directly to the idle-up valve and then you'll have direct vacuum to the idle-up valve.   (13/28)