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Glossary
GLOSSARY OF TERMS AND ABBRREVIATIONS
83 Chapter 6
KAPWR – Keep Alive Power, used to power KAM circuit of
the processor.
KNOCK SENSOR (KS) – Input device that responds to spark
knock, caused by over advanced ignition timing.
KOEO – Key On/Engine Off.
KOER – Key On/Engine Running.
LEAN MIXTURE – Air/fuel mixture that has excessive
oxygen left after all fuel in combustion chamber has burned, 1
part fuel to 15 or more parts air.
LED – Light Emitting Diode.
LOCK UP TORQUE CONVERTER – Converter with
internal mechanism that locks turbine to impeller when
engaged.
LUS – Lock-Up Solenoid.
M/C – Mixture control or mixture control solenoid.
MAF – Mass Air Flow sensor, used to measure amount of
airflow through the throttle body.
MAP – Manifold Absolute Pressure sensor or its circuit.
MAT – Manifold Air Temperature.
MFI – Multi-port Fuel Injection.
MIL – Malfunction Indicator Light. Check engine light.
MICROPROCESSOR CONTROL UNIT (MCU) – The
controlling computer, used on early Ford feedback carburetor
systems and all 5.8L feedback carburetor equipped Fords.
MIXTURE CONTROL SOLENOID – Device installed on
carburetor, that regulates the air/fuel ratio.
MLP – Manual (shift) Lever Position sensor or its circuit.
MPFI – Multi-Port Fuel Injection.
MULTI-PORT FUEL INJECTION – Individual injectors for
each cylinder mounted in intake manifold. Injectors are pulsed
in groups rather than individually.
NDS – Neutral Drive Switch.
NGS – Neutral Gear Switch or its circuit.
NON-VOLATILE MEMORY – Memory retained in block
learn cells (not affected by turning the ignition ON or OFF).
NOx – Nitrous Oxides.
NPS – Neutral Pressure Switch or its circuit.
OCT ADJ – Octane Adjust device which modifies ignition
spark.
6
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