Found a cracked abs ring at osr wheel repaired ring and cleaned out throttle body road tested and all seems ok.I personally can't see the relevance if anything I would think an abs fault would have the opposite affect.One of the tests I done on the road was to check the output from the ecu at throttle motor using a low amps clamp and found a current rise as the fault occurred this indicated that the ecu was controlling the throttle motor incorrectly?Anyway time to give customer his car back any more info and I will post.