idles @2200 w/ v1 pluggedin only

When I have the v1 plugged in, the idle carries @ 2200 above 10 mph.
I have been tweaking the throttle crack and follower tables trying to get it to idle down.
Its a 6.2 l92 head 570lift 240 duration cam, w/ ls3intake and injectors., Also a 98mm TB.
The tune is just about done, but I am having a hell of a time controlling the idle.
So I said screw it and drove it to get it aligned this morning and lo and behold, it ran great!
the only difference was no v1 plugged in.
I remember back in my days @ GM, the Tech 1 scanner would do this also. Never heard of it with efilive though.
Not related to ect,vss,as far as I can tell.
Will pick it up from alignment shop this afternoon and see how it acts then.
Any advice?

V1 is compatible with PWM communications, but not CAN (GMLAN). Did you retro fit the L92 with a 24x CKP and 1x CMP sensor to use an LS1-B PCM ? If so, is the OBD-II port configured for PWM, CAN, or both ?


Regards,
Taz

Put a car crank in it, believe it to be a 1999 ls1. had a 2002 vette ls6 stock setting ecm in it before. Changed nothing but the tune parameters, still old style ecu.
Just picked it up, back to doing the high idle thing again.
Does the larger TB affect the iac airflow? Can shut off the follower but having trouble just minimizing it.