Car has an idling problem, cause A/C not to cool when stopped
I was told my car has an idling problem causing the compressor not to come on when setting at intersection waiting for light to change or even when leaving car running to cool the inside. The A/C is cooling when driving. You can tell the difference in the performance of the engine.
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take it to an accredited ac specialist shop as there are two possible reasons
too much gas in the system locking the compressor or a failing compressor you say there is no problem when the ac is off and the only thing that can be affected is the ac compressor
if the car is loud/noisy there is a hole in the exhaust system and this will cause a rough idle because of a loss of back pressure and the vales will not open and close properly resulting in the rough idle it also will make the engine run hotter and this will cause your spark plug gaps to increase and the spark will be less than needed to ignite the fuel in the cylinder for proper combustion which will result in poor gas mileage and lack of power is the check engine light on?
You may be low on a/c refrigerant. Your car could also be overheating which is affecting the idle sensor. These two may also be related. The motor on the electric radiator fan of this car is the weakest part of the entire cooling system. After a drive, put the car in park and leave the motor and a/c on. Open the hood and check that the electric radiator fan is clicking on regularly. If it seems to be malfunctioning (worn out) then your problem could be that this is causing your radiator to overheat and the a/c compressor as well. When the a/c compressor overheats, it vents freon (by design) to save itself to save itself from permanent damage.
Your sensors may be doing exactly what they are meant to do, but it wasn't a bad idea to change them as a starting point. Have you noticed poor cooling from the a/c as well? Open your hood in the driveway and check that your electric radiator fan is turning on regularly once the car warms up. There is a fine dance between the electric radiator fan, the a/c compressor, and the idle sensors on this car. If your problem resolves itself at highway speeds & reoccurs when you stop, then the problem is that your electric radiator fan is in need of replacement. The brushes inside that electric motor do wear out from use - especially in a hot climate - and are not designed to be replaced by a home mechanic. You can have the electric motor rebuilt by a electrical shop - or just replace it yourself with one ordered at any parts counter. When the cooling fan does not switch on at idle speeds, the a/c compressor will overheat and cause it to vent freon to save itself from permanent damage. The overall excess heat buildup in your engine compartment also causes the idle problems where it will surge up and down in slow traffic or at a stoplight. When I changed that motor it solved many inter-related issues that I was having.
Does the radiator fan come on before it overheats? And is it boiling over, or just showing hot on the gauge ? Is the cooling system full of coolant and no air pockets ? How do you know the thermostat is ok ?
reasearch "intake manifold gasket". i have the same car, and the same problem, and everything ive read so far points to the intake manifold gasket. apparently during production there was an error that caused the original gaskets to crease. i would suggest taking some brake or carb cleaner and spraying it around intake #1 while the car is idling in park, this should cause the engine to idle rougher. if it does the gasket is your problem.
here's a link to another thread that sheds a lot of light on the issue, and even has some instructions on how to repair.
Have you radiator clutch fan check out, sounds like its bad, air blows through radiator and a/c condenser while driving and no air blows through at stops, will cause a/c pressure to go up and not cool.
if the AC isnt cooling on idle then the fan isnt coming on ,so gas isnt cooling in the rad in front of the car ,now as for the pulling away bit i wiould disconnect the servo vacumn feed pipe and block the end of the pipe and try that in case the diaphragm is letting in air causing the idle to speed up
if it was my i would be looking at the drive belt and the water pump give these websites a try www.autozone.com and www.alldatadiy.com if all fails stop by your local library and get your hands on a Haynes auto repair Manual for your car or stop by your lincoln dealership in the service department and ask for the manger but please do not keep trying to drive the car cause it will do damage to the engine nice car wish you the best of luck Michigan Man.
Your freon level is low, and not circulating on slow compressor speeds. Stop by any shop that has a sign stating they work on a/c and they can recharge it for you in a few minutes. Here where I live they charge about $20.00 labor plus a charge for the freon they put in, they sell it by the pound.