ok so im just in from the shed and i have done the following:
1) took out and taped up every coil to cover any possible "cracks"
2) undid battery, let it sit for a bit while hitting the brake pedal and playing with the light switches (whats that ment to do if there is no power?) then reconected it all up again
now for the test run, i did about 20 standing starts, pushing hard through first gear all the way up untill hard in 4th.....and it was perfect, not one backfire, there was a small hessitant bit in one of the launches though....
but then as i went to take a corner hard in first gear over 4000rpm is backfired and coughed like crazy, this would suggest a problem either in the fuel tank pump or with the new fuel pump the previous owner put in????? only did it in corners under hard excelaration, like as if the force of the car was moving a pump and not picking up correctly???
cheers
rhys