Right, so here's how it stands at the moment, the chargers being sent off to be helicoiled tomorrow by a local engineering firm.
I decided yesterday to get the car off my nans drive and keep it outside my own for the time being, only a couple of hundred yards down the road. Apart from the slight oil leak from the banjo bolt, I assumed the car would be all ok. Upon starting, the car began misfiring again and after letting off hard throttle, would cut out. The amount of black smoke leaving the car is ridiculous and I originally thought this would clear up. I continued to drive the car down the road for it to then begin kangooring or stuttering and under hard throttle, would have no boost whatsoever. I was then flashed by my mate behind me, pulled over and found that around the area where I gave it hard throttle, a huge puddle of oil had been dumped. Upon inspection, I could not seem to find where it had come from whatsoever purely down to the fact the whole underneath of the engine was covered.
Any ideas guys, I'm at my wits end with this now and considering taking it to a garage to get sorted.