Need to know more about your car year make and modle
http://wiki.answers.com/Q/Why_won't_my_car_idle
Most likely your electric cooling fan is not working, or (if older rear wheel drive car) the "fan clutch" is bad! I you have an airconditioner, the (engine cooling) fan is supposed to run all the time when it is turned on! - This ...
http://answers.yahoo.com/question/index?qid=20080606181...
I have read that you use a miles worth of gas every two minutes of idling. So it depends on the size of your tank.
http://answers.yahoo.com/question/index?qid=20080630043...
What you need to do here is have the computer scanned for code/s light coming on indicates there's a problem within the engine management system, this is your starting point of diagnosis finding out what's going on.
http://www.2carpros.com/forum/2002-cadillac-deville--ca...
Ditto the previous post. Especially on modern cars with computerized fuel management. The computer does enrichen the mixture for starting, but typically the fuel system goes "closed loop" within a minute or two (even in cold ambie...
http://www.automotiveforums.com/vbulletin/t352829.html
this is why i dont like buying cars, always unmentioned problems and when u ask the person about it after the fact the response is the same..."thats wierd, that never happened to me." a little off topic...has anyone ever used the ...
http://www.honda-tech.com/showthread.php?t=2250274
No it won't ruin your engine as long as your cooling system is OK. Cars idle all the time. Think about all the police cars that sit for hours at the scene of emergencies with the engine idleing.
http://www.faq4me.net/Maintenance_Repairs/299324.htm