What Are the Causes of Car Idling Shaking and Stalling?
2 Answers
Car idling shaking and stalling are caused by: 1. Failure of the vehicle's ignition system; 2. Loosening of components in the ignition system; 3. Severe carbon buildup in the engine; 4. Aging of engine components; 5. Excessive carbon buildup in the throttle; 6. Untimely replacement of the air filter; 7. Excessive carbon buildup in the fuel injector; 8. Problems with the ignition system; 9. Unstable oil pressure. Car idling is not a speed but a working condition. When the engine runs without load, it is called idling. When the engine is running and the accelerator pedal is fully released, the engine is in an idling state. The engine speed during idling is called the idling speed, which can be adjusted by changing the throttle opening size.
My old ride had the same issue a while back, shaking like a tractor at red lights, and once it even died on me in the middle of the road. After a mechanic checked it out, turns out it was mostly due to a severely carbon-clogged throttle body blocking the air intake—starving the engine of air at idle and causing it to stall. It could also be worn-out spark plugs misfiring or clogged fuel injectors spraying unevenly. The sneakiest culprit? Worn engine mounts, which are supposed to dampen vibrations—when they fail, all the engine shaking gets transmitted right into the cabin. Low fuel pump pressure can also starve the engine and kill it. Any of these issues will shake you up real bad, so it’s best to head to a shop and scan for trouble codes ASAP.
