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Hello all, I’m a new member here. I got some great help on another project from mopar1973man (thanks again brother) on another forum and figured I'd come over and try to get help on this nightmare.I will try to keep it short and sweet. I am working on a 2006 base model Ranger 4x2 with a 3.0 L auto for a friend. After more low compression problems than any vehicle should have in a lifetime ( bad valve seats), we have just replaced the engine AGAIN. The replacement is from an ’06 Taurus. I finished the install and took it on a 15 mile test ride. 1 mile from home the check engine light came on. Cyl. 6 misfire.Checked compression on a couple of cylinders obviously #6 included and they were at 160 PSI.The replacement engine was pretty complete so I have a few test parts.I swapped #4 and #6 spark plugs. No change, it’s not the plug.I replaced the plug wire. No change, not the wire.I installed the Taurus ignition coil. No change, not the coil.I replaced the entire set of injectors with the set from Taurus, with the thought that the flow rate could be different but if they all match it should still run good. No change, injectors are OK.I also swapped the crank and cam sensors and last but not least I tried seafoam in the fuel and oil with the thought maybe the valves in #6 could be sticking. Still get the light EVERY time.I was a line tech mostly at dealerships for about 25 years so I’d like to think I have a good idea what I’m doing but, I don’t have access to much tech info and don’t have a good scanner anymore. ( Stupid thieves) That being said, I despise just swapping parts without knowing they are bad before I replace them but I need to get this thing back on the road and you do with what you have right?Their isn’t much left that I can think of that could cause a misfire. I don’t want to condemn the computer without absolutely knowing but what else could I have missed?Any thoughts? Thanks in advance for any help or ideas you may have.