The firing order on a Ford F-150 depends on its engine; for a V6 it is 1-4-2-5-3-6, and for a standard V8 it is 1-5-4-2-6-3-7-8. The firing order may change according to the engine size and type.
Other engine variants include a 1.8 liter, 5.0 V8 and V10. Each firing order is specific to the type of engine. The 1.8 liter firing order follows many standard four-cylinder engines, which is 1-3-4-2. The 5.0-liter V8 engine, which is commonly referred to as the 351 big block, has a firing order of 1-3-7-2-6-5-4-8. The largest engine in the series is a V10 6.8-liter big block, which is found in Super Duty trucks, and its firing order is 1-6-5-10-2-7-3-8-4-9.