The 7747 ecu file has 2 constants that my 8746 ecu file doesnt have. Its Open Loop Idle - ON, and Open Loop Idle - OFF, its in RPMS(at adresses 2a0 and 2a1). Ive gone through the 8746 (ANLU) hac and didnt see anything like that. Ill go through it again. Im thinking with the problem im having, the rpms have to be over like 900 rpms to kick out. If anyone could point this out for me on the 8746 (ANLU) hac it would help me alot. thanks

 

The '8746 doesn't have open loop idle. With the '7747 GM used it with some of the BB trucks.

RBob.