I had a 1997 Ford Contour that did the exact same thing.It turned out to be 2 different sensors. It cost about $550 to get them fixed.
Stop idiling? Do you mean surge? It's likely to be either the Mass air flow sensor or one of the O2 sensors.
Need more info. What kind of smell are you smelling?
Probably a senor: MAP, MAF, IAC, pr TPS
Some, but not dramatically unless you are idling for an extended period, say an hour or more.
out of gas or stopped up gas filter OR it just needs a good tune up
vaccum leak somewhere. or a boost leak Spyda
my 2005 ion shakes while idling.. has done this ever since i got it in 2005
I'm not sure what you mean by "Hard" but if it's reving high adjust your idiling screw.
check for vacuam leaks if non found replace iac valve
No. Recent advance in technology do not require idling of a semi.
I have a 2005 Kawazaki Ninja 250 my personal best 85mph. Idiling about 11000 prm
It shouldn't be doing that ... an electric fan should be kicking in to help cool the water circulating through the radiator.