Bit of an update.. Ran 12v straight from the battery to the coil and bypassed the resistor and then checked all the leads/plugs were firing. Found that while on 12v cyl 2 was firing, however when removing the lead the change in engine rpm isnt quite as noticeable as 3/4/5/6. It ONLY did this on petrol. So I'm just taking a guess here but, leaking intake manifold somewhere around 1+2? Because gas is more pressurized than petrol it would be able to leak out easier, meaning that the cyls would still be getting fuel, just no where near as much?