This means:
* Cylinder 1 fires first.
* Cylinder 3 fires second.
* Cylinder 4 fires third.
* Cylinder 2 fires last.
Keep in mind that this firing order is for most 2.7L Tacoma engines. However, there may be slight variations depending on the specific year and model. It's always a good idea to consult your vehicle's owner's manual or a reputable repair manual for the most accurate information for your specific Tacoma.
