Ford Repair: 93 Ford Taurus, 3.8 liter, automatic, 130,000 mi, taurus 3, ford taurus

Question
The car started to miss at all speeds.  I changed the spark plug 1 year ago.  Ohm them out and cleaned them.  They looked good.  Checked the wires with ohm meter.  Looked good.  Changed the fuel filter.  Tried to check fuel pump.  I hooked up fuel that max out at 25.  Started the engine and at idle checked the pressure at the fuel injectors.  It hit 25 and blew hose off.  I'm assuming the fuel pump is good.  Pull wire of ignition coil and had white powder.  Cleaned and replaced.  Started and ran for a few seconds.  Would not start.  Pulled wire off and put it back.  Started.  Runs better but still missing.  Changed the coil wire and the front three.  Still missing.  Trying to change rear three wires but cannot break loose the wire harness holders.  

Any ideas?  Thanks.

Answer
Hello and thanks for the question...I'll try to help.
 What kind of gage did you use to check your fuel pressure? The spec is 41psi at idle and about 61psi with the regulator disconnected from vacuum. I would recheck THAT and go from there.
Hope this helps,
Erik