Firing Order Ford Freestar 3.9 – It’s essential to know which financial institution (or cylinder head) is number one to help you establish a starting point for firing order or just to replace the proper portion, as an Oxygen indicator, gasoline injector or ignition coil.
In the past all that was necessary to find out which bank or cylinder brain is primary was to see which cylinder head is placed the farthest frontward. One which is easily the most frontward (closest to the leading of the engine) is the number one cylinder and therefore area is financial institution 1.
But many motors these days have cylinder heads which can be located uniformly, which makes it more challenging to determine which is lender # 1 and that is bank number two. Several frequent reasons we should know this, for instance is to establish Oxygen sensing unit to change when you are looking for B1 S1 (Bank A single Sensing unit One), or if you’re seeking to find an ignition coil to examine for a P0301 (#1 cylinder misfire recorded) misfire code.
What you should attempt