Introduction

The 88-93 VR Commodores use the 1227808 ECM which is basically the same as a US 1227165 ECM that is limited by hardware to 160 Baud communications.  These ECMs have torque converter lockup control as required for a 700R4 or similar automatic transmission.

Hardware Required for Tuning

• G1 Chip adapter and C2 27SF512 chip required to reprogram ECM
• BURN2 Chip Programmer programs 27SF512 chips
• ALDU1 with CABL1 required for datalogging
• Ostrich2 required for real time tuning
• APU1 AutoPROM All-in-one device works great, taking the place of BURN2, ALDU1+CABL1 and Ostrich2

Software Required for Tuning

These computers use the $5D, $A5, $B1, $DB, $FB or $03 masks.

TunerPro RT has editing definitions on the website for $5D, $A5 and $FB

 PCMHacking.net appears to have datalogging definitions for TunerPro RT.

TunerCat OBD1 tuner has editing definitions available for $5D, $A5, $B1, $DB and $FB