Answer
Sep 27, 2021 - 06:41 PM
Hello AJ.
Inline 4 cylinder engines use "Wasted Spark" ignitions, meaning both cylinder pairs, 1/4 and 2/3, fire both outputs at the same time.
Using the 1/4 coil as an example, the coil knows which cylinder is on compression (based on cylinder pressure, cylinder 1) and will direct the maximum spark output possible to that cylinder.
The remaining spark energy is directed to the opposite cylinder (4) which is firing on the exhaust stroke (no compression) and nothing happens, hence the term wasted spark. The same happoens with the 2/3 coil.
So, it does not matter which spark plus wire attaches to the 1/4 coil or the 2/3 coil so long as the plug wires are going to the correct cylinders (1/4 or 2/3).
Hope this helps.
Inline 4 cylinder engines use "Wasted Spark" ignitions, meaning both cylinder pairs, 1/4 and 2/3, fire both outputs at the same time.
Using the 1/4 coil as an example, the coil knows which cylinder is on compression (based on cylinder pressure, cylinder 1) and will direct the maximum spark output possible to that cylinder.
The remaining spark energy is directed to the opposite cylinder (4) which is firing on the exhaust stroke (no compression) and nothing happens, hence the term wasted spark. The same happoens with the 2/3 coil.
So, it does not matter which spark plus wire attaches to the 1/4 coil or the 2/3 coil so long as the plug wires are going to the correct cylinders (1/4 or 2/3).
Hope this helps.
