348 missfire

Well i have been finally hit with the 348 gremlins. Last few weeks when stopping for lights the car has misfired for a few seconds. Happened 2-3 times. Thought it may have been water in the system as i have been caught in the rain quite a few times lately. Today at around 2000 RPM seemed to suddenly miss badly. Almost as if it was running on 4 cylinders only. When i drove below 200 rpm it was alright to limp home.
Got home and decided to reset ECU, so turned off the switch waited for 2 minutes and commenced the re-learning run through process. Everything was normal until i went to drive away. Misfire returned. While the engine was running, JUST, moved the ignition leads on the right hand coil pack and returned to normal again. Ran well for a minute and then misfire returned. Now it will not even idle at all.
O'K a few weeks ago i cleaned the crank sensors and discovered that the connecting plug to 1 had broken up. Reconnected and seem to run fine.
I plan to replace both firstly. My other thought was it had the symptoms of a fuel starvation issue. Have 2 spare fuel filters so will replace those tomorrow.
Any other ideas guys? HELP

 

Thanks Scot, i am thinking it is an electrical fault myself. After the first time i wriggled the leads and that fixed the fault, it would not do it for a second time when the fault reoccurred. I have done the same with both coil packs. Fault is now constant.

 

Thanks guys i think what i will do is replace both crank sensors and coil packs. While i am at it may as well do what Marco has done and replace ignition lead cables.

 

Problem found, crank sensor plug fallen apart and contacts touching.
Thanks to all.