Computerized Engine Controls: Notes

Fuel injection system is Throttle Body Injection (TBI) on Tracker (Federal). Multiport Fuel Injection (MFI) is used on (California and New York). The electronic fuel injection engine control system monitors vehicle operating conditions through input signals and regulates air/fuel mixture and other engine control operations by output signals. This lowers exhaust emissions while maintaining fuel economy and driveability.

The control systems have a fail-safe mechanism. If a fault occurs while driving, the system will substitute calculated signals and/or pre-programmed values. Driving performance will be affected, but vehicle may still be driven. These systems have a self-diagnostic feature capable of recognizing a system fault and storing a related trouble code in memory for future retrieval and diagnosis.