According to Saturn timing specifications, the internal
firing 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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https://www.6ya.com/expert/jeremy_69f3cc28d95bf514
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