What does a spark gap do?
Spark gaps are frequently used to prevent voltage surges from damaging equipment. Spark gaps are used in high-voltage switches, large power transformers, in power plants and electrical substations.
What does an open ignition coil mean?
An open or higher than normal resistance in a coil’s secondary windings will also cause a weak spark or no spark, and may also damage the PCM driver circuit due to feedback induction through the primary circuit. DIS ignition coil and pencil coil for coil-on-plug ignition system.
What is the setting of the spark gap on a spark ignition system?
The spark plug gap adjustment should not be changed more than 3 times and should not exceed . 008″ in either direction. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. Also, the spark plug gap should never exceed .
Do you need to Gap new spark plugs?
Do Spark Plugs Always Have to Be Gapped? Not always. In the past, it was necessary to gap spark plugs, but today spark plugs are usually pre-gapped. It is advisable to double check that the gap is correctly set to the vehicle’s recommended setting when installing spark plugs.
What effect does the open circuit have in the primary circuit on the ignition system?
When the points open and close it triggers the primary ignition circuit, which in turn fires the coil. Inside the distributor, there is something called the rotor which rotates and deliver the spark to the correct spark plug wire which ignites the spark plug.
What happens if the spark plug gap is too small?
If the gap is too small, the spark will easily jump across without too much ionisation so no hot flash. This can mean partial ignition and low power or even another misfire. So spark plugs have a gap recommendation that should be closely followed for reliable, powerful engine function, not too much, not too little.
How do I test my ignition coil without spark?
Disconnect the ignition coil wire from the distributor and install the spark tester to the wire and ground the tester to the engine. Crank the engine for a few seconds. If there’s spark, the problem is with the distributor cap (carbon tracks or wear) or rotor. Consult your vehicle repair manual, if necessary.