2003 Ford Explorer 4.0 L Firing Order – It’s vital that you know which lender (or cylinder Top) is number 1 to help figure out a starting point for firing order or perhaps to switch the proper component, like an Oxygen sensor, gas injector or ignition coil.
Previously all of that was required to determine which bank or cylinder head is primary was to see which cylinder go is positioned the farthest frontward. The one which is easily the most forward (nearest to the top of the engine) is the best cylinder and this area is banking institution a single.
But many engines today have cylinder heads that happen to be situated uniformly, rendering it harder to find out which is lender number one and which can be banking institution second. Several frequent good reasons we have to know this, for instance is always to determine Oxygen sensing unit to exchange when you are interested in B1 S1 (Lender One particular Sensing unit One), or maybe if you’re seeking to find an ignition coil to inspect to get a P0301 (#1 cylinder misfire documented) misfire code.
What you should attempt
Several cylinder motors generally have the #1 cylinder closest to the top of the engine (just one banking institution).
V-6 or V-8 try to find the connect that may be closest to the front of your engine, when the cylinder heads are even another way of figuring out #1 will likely be necessary.
Don’t overlook the evident, check on the spark plug cable itself for cylinder amounts.
Also look into the ignition coil for figures.
For those who have a scan tool, consider disconnecting an oxygen indicator temporarily to find out which is B1 or B2. Usually a pending code or tough code will set quickly. Also look at the details monitor from the scan device, the voltage must typically standard to .5V.
If everything else breaks down look at the assistance guidebook. A lot of on-line places provide comfortable access to firing order and a lot more at DIY pricing.
A Few 2003 Ford Explorer 4.0 L Firing Order Available here