Hey guys I'm new here and I think I might be having a problem with my truck. The engine has the tendency to idle a little higher than normal when sitting at a light with the tranny in drive. If I put it in neutral and back to drive it idles down like normal. The funny thing is it does not do it all the time. I have been doing a little reading and I am wondering if there is a problem with the IVS switch on the pedal. Any thoughts or suggestions?