2003 Ford Explorer Firing Order 4.0 – It’s important to know which lender (or cylinder head) is primary to aid figure out a starting point for firing order or maybe to replace the right aspect, as an Oxygen indicator, gas injector or ignition coil.
Before all of that was necessary to determine which financial institution or cylinder brain is primary was to determine which cylinder head is located the farthest forward. One that is easily the most ahead (nearest the leading of your engine) is the main cylinder and this part is lender one.
However, many motors these days have cylinder heads that are positioned consistently, which makes it more difficult to determine which is bank primary and that is banking institution number 2. A couple of popular motives we must know this, as an illustration would be to determine Oxygen sensor to change when you are interested in B1 S1 (Banking institution One Sensor A single), or maybe you’re attempting to locate an ignition coil to inspect for the P0301 (#1 cylinder misfire documented) misfire code.
Points to consider