How do you know if an ignition coil is bad?

The car may misfire or not accelerate properly

You can test the ignition coil on a car by using a multimeter. A bad ignition coil can be the cause of a car not starting. ...

It could either be a bad ignition coil, a bad ignition rotor, a bad ignition cap, a bad ignition control module (if equipped), or a bad coil to cap wire. ...

Yes, a bad coil will prevent the ignition from firing and the engine will not start. ...

The engine will either not start, or run poorly if the coil is bad.

A bad ignition coil will cause your engine not to have any spark. Without any spark the engine cannot start or run. ...

Ignition coil is bad, is it right on top of the cap maybe a bad wire in the wirng harness or bad connector. ...

When an ignition coil goes bad the car will not run right, or not at all. An intermittent coil will cause shudder, or a jerking motion. When the coil has no output then the cylinder that the coil feeds cant burn the fuel and cause power. ...

when the hall effect and ignition module are good, the injectors and coil no work maybe this sensor is bad ...

Go to AutoZone have them rear your codes for FREE. This way you will know which Coil Pack is goig bad / or is bad. If you have a 4.6L you will have only 2 Big Coil Packs. If you have the 5.4L you will have 8 Coil Packs , One coil pack for each cylinder. ...

You bet. A bad coil and you have no spark to the plugs. No spark and the fuel cannot be ignited. ...

bad pick up or bad ignition module

A bad coil can damage a converter. If the engine is misfiring, it will cause raw fuel to get into the converter and that can cause failure. ...

It is important to recognize the signs of car parts going bad. The symptoms of an ignition coil going bad are bad fuel economy, backfiring, starting problems and engine misfiring. ...

bad ignition coil, bad plugs. bad plug wires, bad ignition control module........ ...

The spark is always blue. If your coil is bad your engine will misfire.

It would REALLY HELP to know the year. Could be these things. Ignition module in distributer, pick-up coil in distributer, Bad COIL wire, Rotor button. Depending on the year 1996 and up it could be a CAM sensor, CRANK sensor, Ignition coil, ignition module. ...

The ignition coil sends power to the spark plug at the right time to ignite the fuel. If it goes bad then the scooter wont run. ...

A bad ignition coil normally won't allow your engine to start given there is no spark. If it is starting to go bad, it causes misfiring which can be noticed as a stutter, or random shake of the engine. Check the ground of the coil before replacing it. ...

No spark could be caused by several things: no voltage to the coil or ignition system; a bad coil; a bad ignition system; bad pickup coil(s) in the distributor; a bad coil wire; or more serious engine problems such as a broke camshaft or camshaft timing chain. If your distributor is fine and the coil is good as well as the ignition system is in working order, you might check the computer on the side of the air cleaner. ...

bad coil, bad ignition control, bad ecu, blown fuse and or switch need more info ...

Bad coil? Bad dist. cap? Bad rotor?

Bad idle, lack of power. Vehicle may shake or vibrate at idle.

A bad ignition coil can cause your 1987 Acura tachometer to quit working. A bad tachometer cable or ground wire can also cause it to quit working. ...

Numerouse possibiities, bad gas, bad carburetor, bad spark plugs, bad spark plug wires, bad ignition coil, bad battery, bad ignition swithc, etc.. ...