You can try the following: For modelling sparks, you can try using exponential burst source, refer link below: https://www.ema-eda.com/how-to-page/how-to-simulate-repeated-exponential-electrical-fast-transients-efts/ For modeling ignition coil, you try modeling magnetic coil - links that can help mentioned below: PSpice magnetics.lib https://www.flowcad.de/AN/FlowCAD-AN-PSpice-BH-Curve.pdf PSpice is shipped with numerous coil models too - refer below - navigate to Categories > Magnetics https://www.cadence.com/en_US/home/tools/pcb-design-and-analysis/analog-mixed-signal-simulation/pspice/pspice-models.html?filter=8036
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