Ecm?
 

'08 ultra riding along @ 65 -70 all at once no throttle dies right to idle. replaced twist grip sensor worked great for about 50 miles then same thing. codes say replace ECM. anyone else had this problem?

hmm.. did you by chance check the pins in the harness of the ECM. they have a tendency to work themselves loose especially if it's been pulled apart for tuning and such. when you're done checking the pins, make sure to put dielectirc grease in the connector.

I'll check that .Thanks

Broken wire inside a connector!