I checked all cables, charged battery, learned ECU again and still the same problem. Other engine is in Viper Jet and wiring not that easy to get to. However Monday I will be able to contact Peter from Intairco he is the importer here in Australia. Will explain to him the problem and he will have spare cable for me to try also. Thanks for your help and advice.
Will inform what the problem is once I know just in case someone haves the same problem as me.