1998 Ford Crown Victoria motor not hitting on cylinder 3 &a

Yes I checked the compression it was with in 8lb of every cylinder, I pulled the injectors and cleaned them they are all spraying a perfect cone, I changed them any way, I cleaned the fuel rail several times with a snap on pro cleaner. The rail is clean, The fuel pressure is very good, all cylinders are getting fuel. All the coils are firing I tested the coils moved them around still the same problem, I still put two new coils on and tested them too.I checked the lobes on the cam they are good, I replaced the lifters and primed them allso changed the push rods They were in good condition, but changed them anyway, I cranked the motor with the valve cover off and the valves were moving up and down and plenty of oil pumping thru the lifters. The injectors are firing correct and have the correct voltage to them, I have the tool to test it plus you can hear it with a stethascope, All the plugs are firing great.I even took them out and cranked the motor and watched the arc, I never do that.I had to see with my own eyes. The timing is fine I checked it I have done mechanical work for years. If you have Fire, compression & fuel it has to run if the timing is right. And it does run on 6 cylinders.I have allso had 3 other people I know come over two of them are full time mechanics and the other builds race cars and they can not figuire it out. It does not make sence at all.I guess it should be in the Smithstonian.I checked it for codes there are no codes. Cylinder 3 and 4 are the problem.I know its not believable if someone told me this I would say impossible. Well its sitting out side and I can not nail down the problem. So what do you think?