Car Shaking While Idle - Free Car Diagnostic

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Car Shaking While Idle

When a car is shaking while idle, it means that the engine is misfiring in one or more cylinders.

Car Shakes While Idle

Engine Cylinder

Reasons why the car is shaking while idle

(1) Engine misfiring in one or more cylinders

Each of your engine's cylinders must fire properly and in the correct order for the engine to run smoothly. If one or more of the cylinders isn't firing as it should, the engine's balance is thrown off. This causes the engine to shake and thus, the entire vehicle to shake as well. The most common causes of misfiring are bad spark plugs, bad spark plug wires and, a faulty distributor cap. Any of these will adversely affect the firing of the air/fuel mixture in the engine's cylinders.

What to do?

Start by replacing the spark plugs and spark plug wires and hold off for now on the distributor cap. New plugs and wires may be all that's necessary to cure the misfiring. But, if this doesn't correct the problem, then go ahead and replace the distributor cap. By the way, any auto parts store will carry the spark plugs, wires, and distributor cap for this vehicle.

Engine Spark plug

The procedure to replace these items is simple and can be found in any repair manual covering this vehicle. If you don't want to do the work yourself, you'll need what most garages call a "maintenance tune-up". This will cover the three items mentioned above. Incidentally, if this vehicle is still under warranty, the above-mentioned items won't be covered.

How to Replace Spark Plug

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