Cadillac sts ticking noise sometimes
 

I have a 2007 cadillacs sts v6 with 114000 milles. Car starts up fine. After it warms up it starts making this tick noise only while idle and not all the time. sometimes seems to want to stall when pulling up to stop sign.stops making the noise around 12 to 1300 rpms when coming to a stop sign. changed plugs less then 2000 miles ago