Cheers for replies. First attempt on dyno was with tc turned off when that didn't work they tried pulling the abs fuses still with no luck. After this I went round site and spoke to a chap on a rs owners stand who said he had seen this before on a dyno day and to sort it I needed to pull the three fuses and go for a drive as this tricks the ecu into turning off abs! It didn't all it did was (with three fuses out) kill all power to ignition system, (with two out) restore power to dash but would not turn over. All three in car works fine. Cheers for your help.