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4.2 You should get to know the particular engine that you are using:• EARLY VERSION TUNED PORT INJECTION (TPI) SYSTEM WITHA MASS AIRFLOW (MAF) SENSOR: The 60102 and 60202 harness willsupport the mass airflow (MAF) sensor, the burn off circuit wiring, and theelectronic spark control (ESC) module in addition to the other wiringcommon to the tuned port systems.• LATE VERSION TUNED PORT INJECTION (TPI) SYSTEMWITHOUT A MASS AIRFLOW (MAF) SENSOR, DESIGNED TO USEA MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR, BUT DOESNOT REQUIRE AN ELECTRONIC SPARK CONTROL (ESC)MODULE: The 60103 and 60203 harnesses are designed for and willsupport this system. This system has three connectors at the computerinstead of the two connectors shown in Figure 4.1.Note: Computer chips, on the later model (late 89 and up) tuned port engines all factorychips have the vehicle anti-theft system (VATS) programmed into them so that theycannot be used unless the factory steering column, compatible with the computer, wasinstalled. For the late model tuned port only you must obtain an aftermarket chip thatdoes not have the VATS programming in it.. For the late model tuned port systems, youwill need to obtain a chip for a 1991 Camaro with the VATS system removed so that itwill be compatible with our harness. Also, GM started using the VATS system in late1989 so if you are using an 1989 chip on an early style tuned port motor then please becareful to use a chip that does not have the VATS programmed into it.Figure 4.1 Fuel Injection Computer4