Throttle cable now replaced and found why the old one had snapped, it was snagging at the end where it enters the holder on the throttle body so I whizzed up a sleeve and new adjuster to smooth that out and it works fine.

I had an odd mis fire that stopped cyl 1 firing but the more I checked it dropped 2 then 3...I put on new plugs and coil packs but nothing...then I noticed that the fuel rail inlet is at cyl 4 so thought fuel was not getting enough pressure...checked everything through and then brimmed the tank..it was showing 20 litres but was moving around a lot from that point...turns out it was empty of fuel and luckily I had not ragged it around...now it runs smooth as and I have spare plugs and coil packs.

Will book in with Mark Shead to check the map now as he thinks it may need a tweak now that I have the hart inlet and better intercooler.