Printable View
1227747 ECM Information $42
This ECM was used in 1987 to 1991 C/K Truck, Van, 4.3L, 5.7L, 5.0L & 7.4L engines.
$42 Mask
Click here for details on how to read error codes known as Check Engine Light (CEL) or Service Engine Soon (SES) can be found in this thread.
*Work in progress*
1227747 Wiring diagrams $42 ECM. New Diagrams updated 3-12-2012
TunerPro definitions for $42 1227747 ECM 1987 - 91 C/K Truck, Van, 4.3L, 5.7L, 5.0L & 7.4L
$42-1227747-V4 (and up) .xdf and $42-1227747-V3.adx are advanced files with Data Tracing for TunerPro V5 RT. For Manual and 700R4 trans.
$42-1227747-V4T.xdf and $42-1227747-V3T.adx are advanced files with Data Tracing for TunerPro V5 RT. For Turbo 400 trans/3 speed bin files.
42.ads is for TunerPro V4.
A033.ds is the origanal ALDL file converted to ads.
*New XDF and ADX files loaded 9/29/12*
$42-1227747-V3/4. adx downloaded 534 times.
$42-1227747-V3/4.xdf downloaded 486 times.
*New XDF and ADX files loaded 7/29/13*
$42-1227747-V5.1.xdf downloaded 424 times.
$42-1227747-V5.0.adx downloaded 278 times.
$42-1227747-V5.1.xdf downloaded 224 views
Bin Files for 1227747 ECM.
These are known good bin files with no recalls from GM. There are many BCC/Chip bin files all over the internet that have been recalled by GM and updated. Why start with a Chip/Bin that has issues to start with?
There are many more good ones, that I will add in time but this should cover any TBI conversion to start.
More bins
To enable Highway Lean Cruise check out the How To at:
http://www.gearhead-efi.com/Fuel-Inj...on-1227747-ECM
Dave W from Old School EFI has made a spreadsheet to help get fueling correct when tuning an engine. You enter your current VE table, your recorded BLM from BLM historygram setup in TunerPro Definitions above and it gives you the new VE table for your bin.
http://www.gearhead-efi.com/Fuel-Inj...r-Spread-Sheet
Works for a varity of differant masks. $42, $E6, $OE, $OD, $31
Here is a data log file for people to use in TunerPro for the Start Up Tutorial.
$42 zip is the old dissasembly that has been around a long time.
daleulan has donated the ARJT.zip folder.
All the others were done by jimindorris. :thumbsup:
The folders ending in 3 have the ESC and Hiway Lean Cruise patch done.
http://www.gearhead-efi.com/Fuel-Inj...n-cruise-patch
Adding AKAK 1142
dave w
Just wanted to add to the library for 7747 ECU.
AZFW - 7.4 R-V chassis/Manual/4.10-4.56
This one supposedly had EGR and AIR disabled, however I could not see that in the tables anywhere. There is a patch listed for it but it would not install.