WS8 Primary & Secondary ignition patterns

Using a ignition tester we tested the primary and secondary ignition circuits to see if we could find any faults,

The first thing to test was the Primary ignition, these are the readings we got from this test

This is a good reading from the ignition primary, as you can see on the graph there is a good ground as the coil switches on, as it is switched off you can see a very strong firing voltage. Looking at the four patterns (one for each cylinder 1,3,4,2) there are no huge differences between them.

On the pattern above you can see that it is in parade format, this format enables us to look at all four firing patterns at the same time to compare them against one another, where as if we used primary display we would only see one pattern.

Secondary voltage patterns

 

The secondary ignition voltage pattern looks normal as each vertical square is 6Kv this coil is producing sufficient voltage to the spark plugs. This is the voltage as a result of the primary coil collapsing and creating its induced voltage.








Above is the graph for the snap acceleration, as you can see the burn time is very short, you can see this by the readings i wrote down,

Cyl #1
Firing Voltage = 12Kv
Burn Time =1.2ms

Cyl #2
Firing Voltage = 12Kv
Burn Time = 1.2ms

Cyl #3
Firing Voltage = 12Kv
Burn Time = 1.2ms

Cyl #4
Firing Voltage = 12Kv
Burn Time = 1.2ms

Next with the engine stopped we disconnected one spark plug wire at shorted it to the engine with a jumper wire, we shorted cylinder #3

 With the cylinder shorted the firing voltage is very low and also the dwell time has shorted.There is no burn time also because the voltage is being shorted straight to the engine.














Next we were to attach a spark tester to another spark plug wire, these are the reading,