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EFI Tech, Part 2 » DR-1111-FUEL-02

ECMs and PCMs come in many different flavors. These controllers were used on pre-1993 vehicles, and although they use different styles of removable PROMs (in which control data is stored), they operate in similar fashion. Over time, the capabilities of factory control systems have been expanded, which necessitated the use of larger capacity PROMs. (More control functions require more tables.)

ECMs and PCMs come in many different flavors. These controllers were used on pre-1993 vehicles, and although they use different styles of removable PROMs (in which control data is stored), they operate in similar fashion. Over time, the capabilities of factory control systems have been expanded, which necessitated the use of larger capacity PROMs. (More control functions require more tables.)


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