Dateline: Detroit, Michigan, 1981—in an effort to meet more stringent exhaust emissions and fuel economy standards, automakers have developed on-board computerized engine controls. With ignition ...

Here's what drives cars of the '80sâ the Electronic Computer Module(ECM).Typical GM unit has an analog board to run sensors, digital board for"thinking" and memory. Removable PROM(at left)calibrates ...

Back in the days before variable valve timing (VVT) and computer-controlled engine tuning, one of the best ways to improve stock engine performance was to install an aftermarket camshaft, a process ...