2003 Ford Expedition Firing Order Diagram – It’s important to know which banking institution (or cylinder Top) is # 1 to help you establish a starting point for firing order or perhaps to switch the appropriate component, like an Oxygen sensing unit, gas injector or ignition coil.
In past times all that was required to find out which bank or cylinder go is # 1 was to determine what cylinder go is positioned the farthest forwards. The one that is the most forward (nearest to the leading in the engine) is the top cylinder and this part is banking institution a single.
But some motors right now have cylinder heads which can be located consistently, rendering it more difficult to determine which is financial institution number 1 and which happens to be bank second. A number of typical reasons we must know this, for example is usually to determine Oxygen sensing unit to change when you would like B1 S1 (Lender 1 Sensing unit A single), or if perhaps you’re looking to locate an ignition coil to inspect for any P0301 (#1 cylinder misfire documented) misfire code.
What you should attempt