How to Solve Intermittent Idle Vibration When the Engine is Warm?
3 Answers
Intermittent idle vibration when the engine is warm can be resolved by: 1. Cleaning carbon deposits from the vehicle's engine; 2. Replacing the engine oil and oil filter. Methods for engine maintenance include: 1. Using qualified engine oil; 2. Using qualified coolant and antifreeze; 3. Regularly cleaning radiator scale; 4. Regularly removing engine carbon deposits; 5. Periodically replacing the three automotive filters; 6. Maintaining reasonable engine RPM. The function of the engine is: to serve as the power-generating device for the automobile, determining its power performance, fuel economy, stability, and environmental friendliness. Depending on the power source, automotive engines can be categorized into diesel engines, gasoline engines, electric vehicle motors, and hybrid power systems.
My car always jerks and shakes when idling while warming up, and I just dealt with this issue recently. It was mainly caused by carbon buildup in the engine, especially around the throttle body. When there's too much sludge, the air intake becomes unstable, just like a person gasping for breath. I disassembled and cleaned the throttle body myself, spraying it with carburetor cleaner to wash away most of the black gunk. Clogged fuel injectors can also cause this—lack of power and shaking when accelerating—requiring soaking with specialized cleaning fluid. Additionally, worn-out engine mount rubber cushions, where cracks reduce shock absorption, can be replaced for around a hundred bucks. A dirty air filter that hasn't been changed for too long can also lead to insufficient air intake, so I check mine monthly for dirt. I recommend cleaning the carbon deposits first, then inspecting the mounts and air filter. If you're handy, doing it yourself can save you a few hundred bucks.
Don't panic when encountering hot idle vibration, I've figured out a few key points. The ignition system is most prone to issues - when spark plugs wear out with enlarged gaps or electrode erosion, unstable ignition naturally causes shaking. Generally, they should be inspected and replaced every 30,000 km. If the ignition coil leaks electricity, the problem becomes obvious when the engine is hot though it may seem fine when cold. For fuel system issues, a clogged fuel filter causing insufficient supply is particularly noticeable in cars with dirty fuel tanks. Also, don't underestimate engine mounts - when those rubber blocks age, engine vibrations transmit directly into the cabin. Last time I replaced both spark plugs and engine mounts together. During maintenance, have the mechanic read trouble codes - abnormal oxygen sensor data can also cause vibration.
