1997 Dodge Ram low idle 200rpm

i have a 97 dodge ram 1500 318 4x4. my truck doesnt have a rampaging idle like most problems out there. it fires up idles normaly then when i go to put it in drive it idles at 200rpm. it used to start up and idle all over the place and shut off. that was problem was fixed when i replaced the iac. i have a new fuel canister evap valve sensor. last winter i replaced both sensors that hang above the transmission pan. i just cant get to the bottom of this. i need my trucks balls back, thanks