Rough running, erratic spark

check--timing --- distributor -cap -egr valve ---oil pressure remember starting oil would be like tar -so timing may be off this is how to read any OBD codes on pre 96 vehicles---------------- https://www.youtube.com/watch?v=RVbDHOiuKpQ

Part 3 -How to Test the Ignition Module and Crank Sensor ...

easyautodiagnostics.com > Ford > 2.3L

Mar 1, 2012 - Spark plugs for cylinders #2 and #3 get spark at the exact same time. ...voltage -12 Volts) to both individual ignition coils within the coil pack. ... Ford Mustang or Ranger (or 2.3L Mazda B2300), this is what you'll need ... for this 'Switching Signal' at the coil pack... but you can also test this ... 1991, 1992, 1993.

How to Diagnose a Misfiring Cylinder (2.3L Ford Ranger ...

troubleshootmyvehicle.com > Ford > 2.3L

Apr 3, 2012 - Bad Fuel Injectors can cause a Misfire Condition. ... the ignition system on the 2.3L Ford Mustang or Ranger consists of 2 ignition coil packs, ...

2002 ranger misfire rough idle - Discussion on Topix

www.topix.com > Ford Ranger

Jul 27, 2007 - My truck is giving the code misfire in number 4 cyl. I replaced my spark plugs, Wires, Coil packs (both of them) and all my fuil ... three (3.0L v6) go bad, the fuel/air mixture gets messed up. Judged: 2. 2 ... My truck runs rough only at idle. ...code for ford ranger 2002, 2.3 5speed. truck runs like a champ but that ...

Extremely stumped! I need the best and brightest 1994 Ford ...

answers.edmunds.com > Edmunds Answers

that is misfire
cause by 3 things if egr main not stuck open
bad compression on any cylinder, (weak or dead)
bad spark , do that long forgotten tune up now.?
bad fueling, lots of tests. injectors leaking or clogged,or way too high fuel pressure? more tests.
want to test, or GUE$$

Exhaust Converter worn out or blocked?

Cylinder Misfires?
Vacuum Leaks?
Old Oxygen Sensors?
Dirty Leaking Injectors?
Egr Problem?
Pcv Issue?
Evap System Problem?

Start Component Testing to find a problem

You've done a great job of trouble shooting thus far. I would certainly suspect the injector after all of that. But, I didn't see anything about you replacing the spark plug itself. I would try that first as a crack in the insulator (even hairline) will cause mis-fires. If the spark plug doesn't fix the mis-fire, it cold be caused by a bad fuel injector, bad signal (like a loose harness or bad wire) to the fuel injector, or a leak or valve issue on that cylinder.

check intake gasket for leak.

You haven't tuned anything. Tune-ups went away in 1980 with the introduction of electronics.
Fuel filter -filters fuel
Injector cleaner-waste of money,on some fords, it will remove the coating on pintle and is not recommended
TPS Sensor,was replaced after you tested it ,and found it defective?
Spark Plugs-ever hear of one failing. Never seen one fail in 47 years.

Have you considered the EGR Valve,Vacuum Leaks,Old O2 Sensors,again,test first,then replace,blocked converter?

Hello
Here is what to check let me know if you need help checking this out
most common misfire causes on the cars I've worked on have been:

1. Spark plugs
2. Spark plug wires
3. Ignition coil
4. Fuel injector
5. Wiring to fuel injector
6. Timing Belt
7. Vacuum leak or stuck open EGR
8. Contaminated fuel or bad fuel pump
9. Weak compression
10. Blown head gasket

do a compression test,as the intake manifold,like alot of fords is no good.

You replace alot of things but you should replace the EGR valve and the throttle positioning valve also. I would start with the EGR valve