95 gmc 1500 remote starting issue

so i just got done installing a BOA 265B keyless entry / remote start in my truck and it all works. but the problem comes into play when i push the remote start button. it starts, but the starter doesnt disengage when the truck starts. i thought it would be a tach wire problem but i cant find anything wrong with it. the wire i tapped off of is getting signal and is varying voltage with the throttle. any thoughts? any help would be appreciated really.

The unit could be bad, had same problem with crimestopper 2014 2way remote start. Change the unit and now it works great.