I had my fuel rail replaced by Vauxhall due to fault light coming on. Since then it still comes on intermittently. Vauxhall can see the codes where is has come off (goes off on restart of engine) but cannot replicate it happening. Only seems to happen when I’m in it. The fault code is down to fuel pressure. They have given back after having it for 2 weeks and driving 100+ miles in it and not fault light. I have it back a week and it’s gone on 4 times. Pedal test this time shows ECN code 8766 but cannot find what it means. I’m pulling my hair out in frustration. No list of power etc when light comes on but in idle the revs are a lot higher. Any help appreciated. Thanks.