I cannot get the 4th cylinder to fire. It has good compretion, and there was a leak at the intake, but I have fixed that, but still cannot get that cylinder to fire. When I remove the spark plug wire the engine continues to run, with no noticable change. The car has no power at all, I have to push the pedal all the way to the floor to make the car move at all. the spark plug works, I have moved it and tested it and it works fine, I have also checked the wire, and tested it, the fuel rail is also functioning, and is expressing fuel, so I am at a loss as to what else could be wrong.