Oscilloscope Pattern #2

HFM-SFI

Primary individual pattern, 40 volt range.

Ignition system o.k.


1 Starting point of burn voltage line

2 Burn voltage line

3 Decay process

t Burn time

Primary ignition voltage in the 40 volt range at idle speed. Faults can be identified more easily in this range because of the higher resolution. The ignition system is o.k.

The starting point (1) is approx. 33 volts, the burn time (t) is approx. 1.3 milliseconds. The decay process (3) is normal.