1227747
www.diy-efi.org/gmecm/ecm_info/1227747/
General info
Programming 101 (focuses on GM 1227747 ECM)
Projects
Jason Weir has a page on putting a '747 into non-GM vehicles.
1227747 used for spark only, on a carbed engine
Closed loop fueling strategy used by the '747
.ecu files
.ecu files describe the layout of tables and data items in a PROM image. There are several image editing programs that use .ecu files in conjunction with .bin files to allow you to edit the tables in a prom image in real world units rather than hex. Promedit and Winbin are two examples. Here are several 1227747 compatible .ecu files:
7747ecu.ecu the most complete version?
Spk747_3.ecu 1227747 used in a timing only configuration (carb for fuel).
PROM images
Prom images are listed by broadcast code, which uniquely identifies the application of the Prom (Engine, transmission, rear end, ECM, ec.)
ABUL 1987 Astro with the 4.3 Z TBI,1227747
ACSU0024 1987 V 1500 (Suburban) 5.7L, 700R4, 4x4, 3.73 axle ratio, and AC.
ACSW 87 C1500 pickup, 5.7L TBI w/T700R4,1227747
AFDY6022 5.0 automatic
AJUK 88 C1500 pickup, 5.0L, Auto, 1227747
AKAJ1147 1987 K 1500 5.7L, 700R4, 4x4, 3.73 axle ratio, leaded compatible (no closed loop) and AC.
AKAL 87 5.7L automatic
AKAR1180 5.7L manual leaded fuel option (no closed loop)
AKDX2088 4.3L automatic
AKSN 88 4.3L 5spd
AMUR 88 C/K pickup, TBI EFI system, 1227747
ANLW5469 89 5.7L automatic
ANLZ5483 5.7L automatic
ANTZ 89 7.4L manual
APAB 4.3L manual 3.42 rear end ratio
ARHT7465 5.7L manual
ARPC7509 5.0L manual
ASDU 1991 Chevy C-1500 5.7L V8 Auto
ASDW9544 5.7L manual
ASDZ9578 5.7L automatic
AZFT9503 7.4L automatic (THM400)
Schematics/service info