1. Vacuum Leaks:
A radiator repair may inadvertently create vacuum leaks in hoses or connections related to the cooling system, intake system, or vacuum lines. These leaks can disrupt the engine's air-fuel mixture, causing the engine to run rough, particularly at idle.
2. Coolant System Issues:
A radiator repair might inadvertently introduce air into the coolant system. This can cause air pockets within the system, affecting coolant circulation and engine temperature regulation. Air pockets can lead to inconsistent fuel mixture ratios and rough idling.
3. Radiator Cap Issues:
The radiator cap plays a vital role in maintaining the proper pressure within the cooling system. If the radiator cap is not properly tightened, it can result in a loss of pressure and coolant from the system. This can affect the engine's cooling efficiency, and indirectly lead to rough idling at stops.
4. Sensor Issues:
Some vehicles rely on coolant temperature sensors to adjust the fuel mixture and engine performance based on engine temperature. If the coolant temperature sensor was affected during the radiator repair and is providing incorrect temperature readings, it can result in improper fuel mixture adjustments and rough idling.
5. Electrical Issues:
Radiator repairs can sometimes disrupt electrical connections related to the cooling system or engine control systems. Faulty electrical connections or damaged wiring might affect components like the oxygen sensor, throttle position sensor, or idle air control valve, leading to rough idling.
If your car is experiencing rough idling at stops after a radiator repair, it's essential to have a qualified mechanic inspect and diagnose the specific cause to ensure proper engine operation.
