HI, I have a 2008 Street Glide with a power commander PCIII, vance and hines true duals with vance and hines muflers, and the backer plate removed from the air filter. The problem is that about every 4 to 5 times i start the bike it wont idle down it stays right around 2000 rpms but i can move the grip foreward to get the bike to idle down then it drops down to right around 1000 rpms, i am thinking i have something wrong with my TPS cause hooked up to the computer it shows the throttle at 2 to 3 percent in the idle position

 

did ya play with the idol screw? well its not, its a tps adjuster and is lactated from factory.

 

08's are known to have this problem when shut down with the throttle slightly opened. To allow the Tps to Relearn the idle speed, turn the kill switch to run, then cycle the Ignition swich on and off 4times waiting 10 seconds between cycles. Hope it's works for You.