This just started happening yesterday, but my car's idle will fluctuate when I'm at a stop. My idle is set at 750 rpms and if I'm stopped within 5 seconds the idle will go to 1300rpms then a few seconds later drop back down to 750 rpms. My only guess is that because of the weather my idle is acting funny, but I drove all last winter and it never did this. Any ideas?

 

You using the AC or defroster?

 

defroster...totally forgot about that...feel stupid now

 

So....was it resolved?