this can sometimes be a confusing answer, I will try to clearify it as much as i can. According to Saturn timing specifications, the internal fireing order for the Saturn 1.9L motor, both Single overhead cam, or Twin cam is as follows:
Left to right 1-3-4-2
If you are routing spark plug wires, and need to know the order of wires from the coils to the engine, the order is as follows:
Left to right 4-1-2-3
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