yes rough idle at cold start.. and coolant loss indicates that coolant is getting into the cylinder and runs rough util he spark plugs burn the antifreeze off. i would have the coolant prob repaired and also have the iac motor checked. this is the sensor that controls how high or how low the car will idle.

Answered by billymac (expert)
2,255 answers provided

What do you think of that stuff you put in your radiator that is supposed to stop coolant leaks? My friend used some and it worked but now seems to be blocking his heater core a bit. Its not a huge problem because it always starts and once you get it running down the road a few feet the idle wont get so low that it quits on you. It does play havoc on the brakes though since I have to use one foot on the gas one foot on the brake to get it in postion to run down the road.

Response from brantcoyle
6 questions asked

well the stop leak is kind of bittersweet it will usually stop leaks. but it will plug heater cores and therm stats . so i would say if not too big of a prob why chance adding more. good luck

Answered by billymac (expert)
2,255 answers provided