2007-08-17 05:14:32 · 9 answers · asked by blai461 1 in Cars & Transportation ➔ Maintenance & Repairs
On a modern, computer controlled car, it could be any of a larger number of items. Don't spend any money unless you are certain of the problem.
It could be the compressor is seized. But if the AC works correctly when you turn it on while the car is moving, this is not your problem.
It could be the idle air control valve. This valve is regulated by the engine management computer to maintain the correct engine idle speed.
It could be the MAF (Mass Airflow Sensor). This sensor can get dirty and can cause all sorts of problems. This is hard to diagnose, but easily fixed by cleaning the sensor. Use CRC MAF sensor cleaner, about $7 at your favorite auto parts store. Be sure you follow the instructions on the can exactly, or you will damage the sensor.
Your car may be overdue a tuneup. Check your owners manual and see if you have exceeded the manufacturers recommended interval between tune-ups.
Take you car to you favorite auto parts store. They will usually connect a scan tool to the computer's diagnostic port so you can see any trouble codes that are stored. They will usually do this for free. Call ahead and ask them.
Or you can bring your car to a reputable mechanic. Be sure you get an estimate in writing before you allow any repairs. Be certain he understands the problem before he starts throwing parts at it. You don't want to pay for any parts that you don't need.
2007-08-17 05:50:54 · answer #1 · answered by Mad Jack 7 · 0⤊ 0⤋
You have lots of answers only one sounds right,the idle air control valve is not working,or the control for it is not.
It always helps us,by us I mean people that can actually give you an answer that is plausible,what year and model your car is.
Without this info you are going to get a good guess,here's mine.
A number of possibilities,engine idle is to low or below specified idle speed,if it's computer controlled the computer is not making the adjustment to bring the idle up to compensate for the extra load,the idle air control valve is not working,or the throttle plate is covered in dirt and needs cleaning,or as one person mentioned the A/C compressor could be seizing or very stiff.
I hope that some of this info is helpful.
Remember info.year make and model.
2007-08-17 05:47:59 · answer #2 · answered by the bear facts 5 · 0⤊ 0⤋
The A/C puts additional load on the engine. It should also trip a relay to boost your idle RPM a shade. Sounds like the drag from the compressor was more than the engine could take at that rate of idle.
2007-08-17 05:53:50 · answer #3 · answered by Tina F 2 · 0⤊ 0⤋
It's possible that the A/C clutch and or pulley are locked up and either not turning or turning with much resistance. Either replace the A/C Bearing, or the entire pump unit.
2016-05-20 22:08:58 · answer #4 · answered by ? 3 · 0⤊ 0⤋
similar thing happend to my girlfriends explorer. it turned out to be air/idle control or something like that. and it wasnt cheap.
2007-08-17 05:22:41 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Well the type of vehicle would help but it sounds like an IAC problem
2007-08-17 05:21:32 · answer #6 · answered by Christian 7 · 0⤊ 0⤋
Have the a/c unit replaced.
It may be locking up.
2007-08-17 05:28:53 · answer #7 · answered by jaybird 2 · 0⤊ 0⤋
You might want to check the a/c's compressor.
2007-08-17 05:32:21 · answer #8 · answered by Anonymous · 0⤊ 0⤋
alternator problem
2007-08-17 05:28:13 · answer #9 · answered by Anonymous · 0⤊ 0⤋