Why does my car surge with the AC on?
When the engine is put under a load by the AC system, the car’s computer automatically attempts to compensate for that by adjusting the idle. If there is carbon buildup within any part of the system, including the idle air control valve, throttle body, or possibly even the EGR valve, it can cause surging.
Why does my AC pulsate?
The pulsating noise you hear is most probably the AC compressor hitting something. Alternatively, refrigerant wires might also be a cause of the air conditioner making loud pulsating noises. If they are too close to a wall, they might be vibrating and hitting the wall repeatedly, generating pulsating sound.
Why does my car have a surge when I Turn on the AC?
Car air conditioning can cause a surge in the car engine if belt have slipped, the throttle body is faulty, or the idle control valve needs replacing. When you turn on your car’s air conditioning (AC), you just expect the cool air to flow, smoothly and quietly. You certainly don’t expect it to affect the way the car is running.
What causes a car engine to surge while cruising?
MAP systems are more prone to surge while cruising than MAF systems, although both will surge during acceleration if a vacuum leak is present. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
Can a vacuum line cause an engine to surge?
Learn more Step 5 – If a vacuum line has caused a leak the engine will surge, as vacuum lines age they can become brittle and fall off the engine or accessory. Learn more Step 6 – If an air intake boot becomes torn and develops a leak it will cause the engine to surge.
Can a vacuum leak cause engine surging when accelerating?
Vacuum leaks most commonly occurs in the hoses, which is most prone to wear and tear due to the under-hood heat from the engine. Vacuum leaks can cause car surging when accelerating on engines with either a Mass Air Flow system (MAF) or Manifold Air Pressure (MAP) system.