GM – setups
Introduction Unfortunately, the 1226870 is an oddball one-year one-model ECM that was only used on the 1985 corvette. It is for a TPI setup with an electronically controlled distributor and features 160 baud ALDL communication for logging. It is a unique ECM. There are no other ECMs that are a “plug and play” swap without […]
Introduction This is one of the first electronically-shifted transmission applications. Some 1991-93 vehicles came equipped with 4L80E transmissions and 16147060 PCMs. This is a P4 generation ECM which speaks ALDL at 8192 baud and have removable “memcals.” This was a one-year PCM which was followed by the 16168625 / 16197427 in later years. Hardware for Tuning […]
Introduction The 84-87 Grand National was a unique car available in limited production. These vehicles featured sequential injection, distributorless ignition systems and other groundbreaking features. A combination of unusual and off the shelf ECMs/electronic components make for some unique needs. These vehicles used two ECMs. 84-85 vehicles came equipped with the 1226459 and 86-87 vehicles […]
Introduction The 1993 Camaro / Corvette LT1 PCM 16159278 is an oddball. It was not used before or since. The $DA2 mask was used in Y-body Corvettes and the $DA3 mask was used in F-body Camaro/Firebirds. Hardware for Tuning G1 Chip adapter and C2 27SF512 chip required to reprogram ECM BURN2 Chip Programmer programs 27SF512 chips […]
Introduction Starting around 1992, GM started putting the newer electronically controlled 4L60E and 4L80E transmissions in their trucks. Along with the electronically controlled transmissions came new ECMs that speak ALDL at 8192 baud and have removable “memcals” – 16197427, 16196395, 16156930, 16168625. These ECMs are largely interchangeable – as a rule of thumb, any of the 4 […]
Introduction The 96-97 F and Y bodies use a unique PCM that is an evolution of the 94-95 ECM but requires unique tools. They are primarily tuned by reflash over the OBD2 diagnostic port, NOT by programming and replacing chips. (Although this is theoretically possible) They have both MAF and MAP sensors which are both used […]
Introduction The 94-95 F and Y bodies are a dramatically different breed of PCM compared to earlier models used by GM. They are primarily tuned by reflash using the ALDL protocol over the diagnostic port, NOT by programming and replacing chips. (Although this is possible – they feature two 28F512 PLCC EPROMs) They speak ALDL […]
Introduction The 86 throttle body injection (TBI) system was the beginning of GM’s transition from carburetors to fuel injection. This is the first of the “classic” speed-density computers which featured a MAP sensor for airflow metering. This fundamental airflow model was used largely unaltered in later designs. P3 generation ECM, 160 baud ALDL communication, 24 […]
Introduction The 91-93 Syclone trucks and Typhoon SUVs were a unique low-production vehicle that featured a powerful turbocharged 4.3L V6 engine. They use the 1227749 ECM, which is most similar to the 1227730 used in the 90-92 TPI V8s. These vehicles were equipped with a 2 bar MAP sensor from the factory along with hardware […]
Introduction The 86-89 F and Y bodies were among the first EFI computers used by GM that featured a Mass Air Flow sensor (MAF) for air metering. P4 generation ECM, 160 or 8192 baud ALDL communication (depends on code mask), “memcal” with 27C128 EPROM. Many of these ECMs feature a cold-start injector. They can drive […]
Introduction The 90-92 Firebird and Camaro were the first of the P4 generation computers which featured a MAP sensor and speed-density for airflow metering. These fundamental airflow models were used largely unaltered in later designs. P4 generation ECM, 8192 baud ALDL communication, “memcal” with 27C256 EPROM. Hardware Required for Tuning G1 Chip adapter and C2 27SF512 chip […]