This vehicle appears to be running fine now. Customer put in an additive which I think was called Re-New from AMTEC. He asked me to re-map it about a week ago and although there was still a little bit of smoke it appears to have cleared up altogether now. Runs much smoother and he is very pleased with the outcome.
I thank all those who took an interest with help and advice and I have a very happy customer which is what its all about.
Regards
Pete M