Engine not idling right

[Jezza_hr]

Okay. I've finally got my 20V back in and connected up, but it doesn't seem to want to idle properly, it's running between 500 and 1000 revs at idle (it seems to level out a little when running the throttle higher) and it pops and bangs both out of the exhaust and the intake. Also, when I switch off the engine there is a little bit of engine run-on.

I've sent a log over to Omex and they have said that all my calibrations are right and said that the issue I'm facing is likely down to fuel pressure, however I know that the fuel pressure is high enough, it built up enough pressure recently to cause a leak in the fuel line that needed attending to, also the spark plugs are being fouled by the fuel and it smells of fuel when running after a while. This leads me to believe that the engine is running too rich or it's not sparking strong enough, despite having not changed the calibration since removing the engine last.

The only other possibility I could think of was that the fuel sitting in the tank over the past year has lost it's integrity and isn't burning right. So I changed the fuel filter, topped it up with 99 octane fuel and put in some injector cleaner...no change.

It's coming to the point where I'm running out of ideas. I've tested the crank trigger sensor, tried running extra grounds off the engine in case it wasn't grounding correctly, cleaned the plugs. Yet it just still seems to be running rich.

Here's a video of the OMEX screen and how it sounded while I was trying to save a log to E-mail over for consideration.
http://www.youtube.com/watch?v=Cd33pLgqwNE

If anyone can think of anything else I'm missing, please let me know.