The winter is not a great time for it, but an FIAV Delete will probly solve the issue. That same forum Oso mentioned is where I found the solution my high idle problem. There is one line in the FSM that if you do all the tests and adjustments per the FSM and it doesn't solve your issues, you should replace the throttle body. ­ƒñªÔÇìÔÖé´©Å­ƒñªÔÇìÔÖé´©Å­ƒñªÔÇìÔÖé´©Å it took me a couple months of trying and testing all the different pieces to sole that. Found the FIAV Delete info,made one, put it on, and immediately had 800rpm. Kinda rough on cold mornings, but I'm in Florida so it's not too bad. Something to contemplate that is completely reversible.