Seems to be an occasional misfire that is somehow related to the AC compressor
If the AC is off when I start the car, I have no problems. Sometimes right after starting the car if I switch the compressor on it will cause the car to run rough for a bit and then it just stalls, but will start up again without a hitch, maybe running rough for a hundred feet or so. I have recently replaced the compressor myself and it has been in working order for several weeks. If the AC is not on the typically I do not have this problem. The problem feels like a misfire but the odd part is that it is related to whether the AC is on or not. Other than that the car runs great. With the AC on
Experienced mechanics share their insights in answering this question :
This is normal when the AC is on. The air conditioning compressor requires torque from the belt system on the engine to power it. When the AC is off, the compressor clutch does not activate, meaning the AC is not straining the engine. When the AC is on, the compressor clutch activates, causing the drive belt on the engine to turn the compressor. The Idle Control Actuator is what controls the engine idle. When the AC kicks in, the engine will drop some RPM, and the actuator opens to allow more air into the engine. When you are at speed, the throttle is open from the accelerator pedal under your foot. the Idle control actuator is not active at this time.
What you describe is normal.
What you describe is normal.
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This is normal when the AC is on. The air conditioning compressor requires torque from the belt system on the engine to power it. When the AC is off, the compressor clutch does not activate, meaning the AC is not straining the engine.
The AC compressor may put enough drag on the motor at idle to cause the misfire and make it easier for you to feel it. You could need new plugs again, perhaps some ignition wires and distributor cap as well. Some carbon on the intake manifold and clogged fuel injectors could also cause similar symptoms.
Indirectly yes. If the sparkplug is misfiring bad enough, it will cause a rough idle and drivability issue. This in turn will cause the A/C compressor to not be able to operate with constant output & will result in possible lower cooling ability.
If an oxygen sensor or mass airflow sensor is failing, it could give incorrect data to your engine`s computer, causing the misfire. When a vacuum line is broken, it can cause a fuel-injected motor to misfire.
Another reason your vehicle shakes when the air conditioner is turned on is a faulty or outdated spark plug. A lack of connection during the early electricity generation is the reason of this. It`s possible that this is due to a single worn-out or damaged spark plug.
Ticking, rattling, clicking or rumbling: A loose piece of hardware could cause sounds like this to occur near the compressor. Hissing or screaming: A loud hissing or screaming noise from the compressor could indicate dangerous levels of pressure inside the unit.
This can be a difficult issue to understand if you`re not familiar, but when a car idles rough when the air conditioning is on, then that can mean the cooling fan isn`t working right, the IAC valve is damaged, or the throttle body is dirty.
Another reason your vehicle shakes when the air conditioner is turned on is a faulty or outdated spark plug. A lack of connection during the early electricity generation is the reason of this. It`s possible that this is due to a single worn-out or damaged spark plug.
The spark is called as Arcing. When the plug is connected to the outlet, it might spark because the contact area is not enough and the electrical current comes. So, you might observe tiny damaged traces on the plug. It is normal.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Seems to be an occasional misfire that is somehow related to the AC compressor
ANSWER : This is normal when the AC is on. The air conditioning compressor requires torque from the belt system on the engine to power it. When the AC is off, the compressor clutch does not activate, meaning the AC is not straining the engine. When the AC is on, the compressor clutch activates, causing the drive belt on the engine to turn the compressor. The Idle Control Actuator is what controls the engine idle. When the AC kicks in, the engine will drop some RPM, and the actuator opens to allow more air into the engine. When you are at speed, the throttle is open from the accelerator pedal under your foot. the Idle control actuator is not active at this time.
What you describe is normal.
What you describe is normal.
when I turn my ac on my cars idle drop and stalls out and the ac is hot
ANSWER : Hello, thank you for writing in. Although the pulley is still spinning, the compressor has likely failed. If it is not properly regulating pressure in the system, one of the first signs is a warm air conditioner. Considering yours is not cooling off, the pressures are not correct. If you believe the compressor is working correctly, you may want to check for a clogged line before replacing it. Keep in mind, a blocked line has likely put extra strain on the compressor, and may cause premature failure. For more help with testing or replacing the compressor, contact our service department to schedule an appointment.
What would cause the clutch on an ac compressor to continue to go bad after being replaced three times?
ANSWER : The compressor clutch relay on these vehicles are a known cause of sticking on the compressor clutch and overheating the A/C compressor clutch coil. Replace the A/C relay to see if it cures the clutch going bad the next time you do a compressor clutch replacement, or replace it now if you have just replaced the clutch.
2008 VW Jetta AC not cold
ANSWER : Hi Allen. By far the best way to have your AC system correctly diagnosed is by having an AC inspection completed first. By having one of our professional mobile mechanics come to your location to diagnose the issue correctly, it significantly minimizes the mistakes in completing the wrong service. In your case, the issue could be as simple as needing to have the AC system recharged, or there is an existing leak that needs to be repaired before refilling the refrigerant. Best economic bet is to have the AC inspection completed first.
Possible AC compressor problem
ANSWER : Hi there. The pulley on the air conditioning compressor or another pulley could be the cause for the belt failing. Some vehicles have the accessories in locations where a shorter belt can be applied and the air conditioning compressor can be bypassed. Your vehicle does have a model that came without air conditioning and an experienced technician can install the shorter belt recommended for your vehicle. The air conditioning compressor will simply be bypassed and out of operation until the compressor is fixed properly and the correct belt is installed. Have an experienced technician, like one from YourMechanic, inspect the AC system for faults and recommend the appropriate repairs for your specific situation.
2005 Toyota Corolla AC Compressor Not Cycling On & Off
ANSWER : Hi there. If the AC compressor is not cycling on and off as usual, it’s due to an internal component failure in most cases and would need to be replaced. If the compressor fails, it typically does not cause damage to other AC system components. It is possible that there is excessive debris inside the compressor or the bearings internal are worn out. The best thing for you to do is either have the AC compressor replaced, or make sure that the compressor is not blocked by any debris and is getting air from the outside of the vehicle.
Does ac compressor regulate the heat disconnected compressor wire due to clicking sound now only 2 heaters in car blowdcold
ANSWER : The AC compressor is responsible for compressing the refrigerant in your air conditioning system. By compressing the refrigerant it increases the pressure that is in the air conditioning lines. When the pressure is increased there is more room for the pressure to decrease. A decrease from high pressure to low pressure will also cause a decrease in temperature. This is how the air-conditioning system works. If you need help with this issue, consider YourMechanic, as one of our mobile technicians can diagnose your A/C firsthand and help you fix it accordingly.
Ac compressor
ANSWER : Hi there. It sounds like you may have one or two concerns here. Does the AC indicator light up when you turn it on? If so, this means that the command for AC is active. If the light flashes, this means the module is telling us that the compressor is not turning. If the light does not turn on, there may be no signal to the clutch. The system does not hold much oil and you may not have seen much come out of the compressor. Inspect any oil that has come out for metal specks or a greyish color; this would indicate compressor failure and now there is metal throughout the system. I strongly suggest having a qualified technician inspect the system, both mechanically and electrically to determine the root cause/causes of your concern. Your Mechanic has several technicians available that can assist you with an ac system inspection and provide an estimate and direction of repair.
