Toyota Corolla Vibrating While Idle
A problem shared is half solved
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rough idling occurs due to poor sparks from spark plugs to ignite and burn the air/fuel mixture in the cylinder, which can be cause by either the plugs or the coils, but if these check out then it’s a poor intake problem as the engine might not be getting enuff air to burn the fuel delivered to the cylinders since at idle most cars run “rich”.. You don’t feel the vibration when you’re driving cause at that point your car is running “lean” but if you are very observant you should perceive fuel from the exhaust smoke and your car wont be as smart as it use to cause there is a drop in horse power. This is cause by either a faulty MAF, a broken air hose or bad intake valve.