like i said, in later engines the computer does everything. in earlier ones the computer still keeps the fuel pump running, can also adjust mixture through signals from the O2 sensor, ignition timing, idle control, idle compensation (when fans, ac compressor, alternator kick in and so on) and other things.

its just that the brunt of the fueling is being conducted by the mechanical system.

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'O=00=O'
bmw 2002.
long live the legend