(eventually this page will have more information) Basics When we talk about “OBD1” GM vehicles, we mean vehicles made from (approximately) 1986 to 1995. These cars used several different types of engine controller – some have one injector for each cylinder (Tuned Port Injection, or TPI along with the LTx motors) while some have fewer injectors that are placed near the throttle body (Throttle Body Injection, or TBI) instead. All the vehicles of this generation speak the ALDL protocol for logging/vehicle communication. For purposes of this guide, “ECM” means Engine Control Module, Powertrain Control Module (PCM), Engine Computer Module (ECM) – terms will be used interchangeably to mean the same thing. Hardware for OBD1 GM Overview 94-95 model years are oddballs.

Many of these ECMs support being reflashed over the ALDL interface (e.g. LT1) using TunerCATS. Some (like the 94-95 TBIs) use a G1 adapter. Many Grand Prix from these years use the G4 adapter.

1982-1995 GM ALDL PC hardware and software for diagnostic code reading and real-time data logging on the cheap. Or at least a whack at it. ALDL is an acronym that means Assembly Line Diagnostic Link It's a proprietary GM PWM TTL level Serial communications protocol. It was not standardized even. The opposite of a liquid market is called a. The largest and most liquid market in the world is the forex. Forex trading has distinct advantages for you as an.

An Introduction To Geographic Information Systems Heywood Pdf Download. Diesels generally use the G5 adapter. The process for tuning OBD1 GM products is pretty much the same for all 86-93 model years.

First, a “chip adapter” is used to convert whatever the ECM in question needs into a form that accepts a 28 pin EPROM. Some chip adapters require soldering for installation (G2, G2X) but most do not (G1, G3, G4, G5). The same EPROMs can be used for all of our OBD1 GM products (except the switching adapters) which is usually the 27SF512 – C2. After a chip adapter has been installed in an ECM, tuning can begin. You can burn chips using a ROM burner such as the BURN1/2.

Alternatively, you can either use the Ostrich 2.0 emulator or the emulation facilities of the APU1 to make changes while the vehicle is running. Logging from the computer is accomplished using either an ALDU1 or the logging facilities of an APU1. For 86-94 vehicles, CABL1 is required to connect the logger and the vehicle. For the 1995 model year, CABL2 is required due to the physically different connector.

Instead of buying the BURN2, Ostrich2 and ALDU1 separately, you can buy the APU1 unit that does the functions of all three pieces in one unit. Hardware G1 – “Memcal” style chip adapter (TPI, Syclone/Typhoon, 94-95 TBI, 92-93 LT1, etc.) G2 – “TBI” 24 pin style chip adapter G2 GN Style – Grand National Only. G2X – Multiple program switching version of G2 G3 – Multiple program switching version of G1 G4 – Blue Memcal style chip adapter for some 94-95 vehicles G5 – Diesel memcal style chip adapter – Header that allows reading memcals in a BURN1/2. Used to read stock program on memcal ECMs. Icom Ic F25sr Software Store here. BURN2 – Programs chips Ostrich – USB Chip emulator, allows realtime changes while engine running Socket Booster – required for use of Ostrich 2.0 in TBI applications.