Hi David, Have you checked the Thunder ECU connections on the red multiplug (under drivers seat) they are very prone for going wide open since they are so small. I check injector patterns here with scope (digital waveform) so you should have two peaks for each injector, injector wires on ECU are red plug on the right as you look down at the ECU. If you need any info on closing them up give me a call 07876716070 but have changed loads of ECU's on these. Some will drive then only tickover and not rev up until re-started.