How to Fix Low Idle Speed in a Camry?
2 Answers
The lower the temperature, the more fuel is required for a cold start, and the presence of carbon deposits will affect the smoothness of the cold start. The solution is to clean the fuel system. Check the condition of the Camry's spark plugs, high-voltage wires, and ignition coils. The solution is to check if the spark plugs have excessive carbon buildup and replace them if necessary. It is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor, among other components. The solution is to inspect the fuel pressure and replace parts if necessary. Car shaking is related to aging engine mounts. If there is an issue with the engine mounts, these vibrations will be transmitted to the steering wheel and the interior, causing shaking at idle speed.
I've driven a Camry for ten years, and low idle speed is nothing to take lightly. The most common issue is a dirty throttle body where sludge jams the throttle plate, causing insufficient air intake. You can remove and clean the throttle body yourself, but remember to disconnect the negative terminal of the battery first! Another possibility is a vacuum leak, especially in those rubber hoses that degrade over time and leak, causing the idle to drop as low as 500 RPM. Clogged fuel injectors are also common—try adding two bottles of fuel system cleaner and take a highway drive. If cleaning the throttle body doesn’t help, chances are you’ll need to check the intake pressure sensor—if its data is off, the ECU will mess with the air-fuel mixture. Oh, and don’t cheap out on air filters—low-quality ones restrict airflow and can drag down idle speed. For older cars, also check cylinder compression—leaky valves are the worst.
