Thanks folks, I will try the quick checks first, before getting hooked up at the garage! fingers crossed its not the ECU though!

Nope nothing else was done, it started perfectly before it was fitted and nothing since. Like i said I have fitted these to other car and never had anything liek this happen?

Hi, It was the Piggy Back plug in box. Thanks

Hi, can anyone help me with this? I have a 97' P38 2.5 DSE, which was running perfectly until i fitted a PSI Power Chip. I have fitted chips previously on other cars, but never had the following result. After fitting the chip the engine will no longer start or even turn over, with the ignition...