In the age of high-top sneakers and room-sized computers, Ford's EEC-IV sequential electronic fuel injection system introduced on the 1986 Mustang was a revelation. It not only set the standard for sophistication but also the incorporation of a mass airflow (MAF) sensor in 1988, made Ford's EEC-IV extremely adaptable to performance modifications. The MAF-based strategy handled most bolt-on parts' added performance with ease. Even mild lumpy camshafts were no problem.
However, when things got serious the EEC-VI needed to be taught new tricks by using a "chip." At the time there were dozens of chip tuners in the marketplace. However, with the advent of OBD-II port tuning, the number of tuners with the equipment (and the experience) to flash a chip has dwindled. These days you have to find an "old guy" to tune these "old cars." - Read More