Table of Contents
Can a bad AC compressor cause rough idle?
When the additional load of your AC compressor is added, it causes the computer to miscalculate and increase idle speed too much. Common sources of carbon buildup include the IAC valve, the EGR valve, and the throttle body.
Why does my engine shake when my AC is on?
When you turn the AC on, the vehicle engine triggers elements such as idle speed or air control motor. You can increase the idle compressor by compensating with an additional drag. The inaccuracy in this process causes the vehicle to shake when AC is on.
What causes rough idle when cold?
One of the most common causes of rough idle on a cold engine is a faulty ECT sensor. This sensor signals the car’s computer when the engine’s coolant is cold or hot, so the computer delivers more or less fuel to the engine. An ECT sensor with an electrical open circuit will affect engine idle when cold.
What causes the idle speed to go up or down?
If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
What are the symptoms of a bad throttle temp sensor?
Symptoms of a Bad or Failing Throttle Body Temp Sensor Common signs include poor engine performance, stalling, and broken electrical connections. A common problem that car owners experience is high or low engine idle. A damaged intake gasket, cold air intake, or PCV valve can cause idle issues.
What are the symptoms of a bad idle control valve?
Irregular idle speed. One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate.