The ignition coil serves as a pathway for the electric current that flows from the battery into the plugs, making it a very important element of your Saturn Lw300's ignition. If your Saturn Lw300 ignition coil malfunctions, you'll have to deal with lots of possible car trouble, ranging from engine stalling to black exhaust gas.
Each time you switch on the car engine, electricity goes through the ignition coil, exposing it to electricity regularly, so this is why this component has to be made from a sturdy material. As time goes by however, this part will fail and your Saturn Lw300 will actually start to display signs; engine stalling, backfiring, engine start up problems, declining gas mileage, and misfiring especially if you're speeding up are likely to happen once the coil is starting to malfunction. The only surefire way to figure out if the coil for your auto is to be blamed for these problems is to test it with a multimeter. This device, also referred to as a multitester, is used to measure resistance, current, and voltage. You will know that something is wrong with your Saturn Lw300's ignition coils if the multitester results indicate a measurement that isn't within the normal range.
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