What is the firing order for a double row engine ?
The firing order on a double row engine can be thought of as two single row engines firing 180 degrees apart. For this reason the crankshaft for a double row engine has two crank throws 180 degrees apart. Considering the rear row. The #1 cylinder fires, the #2 cylinder is skipped, then the 3rd cylinder is fired. When the #2 cylinder was skipped a cylinder 180 deg opposite and on the front row was fired.