Seems the changing the cat only made a short term improvement...
Car now starts and almost idles ok, just refuses to run under load, and wont even get off the driveway
Coolant temp sensor
fuel pump relay
tested all other sensors and they are within spec
Leads should b in 2moro so i'll check them then
The cars also been on tech2 twice, and been given a look over by vauxhall mechanics on 2 different occasions.