I have been having problems for the last four months with misfiring, i have replaced both harness's the ecu and four injectors. Every time a part is replaced it goes ok again for a bit then it starts misfiring.

If the car is started and left to tick over it ticks over fine. If I then go to drive the car within two mins it starts again,also turning off the ignition and starting it again clears it for a couple off minutes.