Since you have replaced the ignition components, have you checked to confirm there are no vacuum leaks? If there are none, have you checked fuel pump pressure to make sure it isn't too high or low?
If you have and everything is good, then either we have a timing issue (unlikely), a fuel injector issue, or a compression issue (unlikely based on mileage unless it has had a tough life).
With that, here is what I suggest. if you have access to a live data scanner, connect it and start the engine. Let me know what the short and long term fuel trims are (STFT / LTFT). If you do not have access to a scanner, we need to check the following.
The easiest thing is to check engine compression. Here is a link that explains how it is done:
If compression is good and no more than 10% difference between the lowest and highest readings, we need to check the injector in that cylinder. The bad part is the upper intake manifold needs removed to access the injectors.
Here is a link that shows how to test a fuel injector:
What I usually do is switch the injector of the bad cylinder with one that is not giving a code. In this case, I would switch cyl 1 and 3 to see if the misfire changes to the number 3 cylinder.
Here are directions for removing the injectors. The attached pictures correlate with the directions. When you reinstall the injectors, I always use a small amount of Vaseline on the o-ring to prevent damage to it.
2001 Ford Truck Ranger 2WD V6-3.0L VIN U
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Injector Service and Repair Procedures
1. Disconnect the battery ground cable.
2. Remove the upper intake manifold.
3. Disconnect the engine control sensor wiring from the fuel injectors.
4. Relieve the fuel pressure.
5. Disconnect the fuel line.
6. Disconnect the vacuum line.
7. Remove the fuel injection supply manifold.
Remove the four bolts.
Remove the fuel injection supply manifold and the fuel injectors as an assembly.
8. Remove the fuel injectors.
1. Install the fuel injectors.
2. Install the fuel injection supply manifold.
3. Connect the vacuum line.
4. Connect the fuel line.
5. Connect the engine control sensor wiring to the fuel injectors.
6. Install the upper intake manifold.
7. Connect the battery ground cable.
Let me know what you find or if you have other questions, let me know.
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Saturday, December 28th, 2019 AT 8:49 PM