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The plugs and injectors don fire in the right order even if we change the firing order in the software – whats wrong?

April 26, 2017firing injectors plugs right Software wrong

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The plugs and injectors don fire in the right order even if we change the firing order in the software – whats wrong?

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The ECU only triggers its outputs in ascending order. The software does not change the order in which the outputs fire. You must match your engine’s firing order to the output firing order on the ECU in the wiring harness. For example, if your engine’s firing order is 1,3,4,2 then 1 should go to ECU 1st to fire, 3 should go to ECU 2nd to fire, 4 should go to ECU 3rd to fire and 2 should go to ECU 4th to fire. The same holds true with an Ignition Expander or CDI-8 unit.