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Mitsubishi Jet Valve

A tiny third valve that admits nothing by air to churn up the air/fuel charge and promote lean running and a complete burn.

Mityvac

A hand held vacuum tool used to produce and measure a vacuum.

Mixing

1. To blend or combine. 2. To use parts, such as tires, of two or more sizes or types.

Mixing Chamber

That part of an apparatus in which a fuel gas, and oxygen or air are mixed.

Mixture Adjustment

To adjust the portions of a mixture, such as air and fuel.

Mixture Control Solenoid

A device installed in a carburetor which regulates the air/fuel ratio.

MK

An acronym for master kit.

MKT

An engine parts kit that contains all of the parts found in an MK plus the timing gears.

ML

(Porsche) Air Mass.

MLP

Manual lever position.

MLPS

Manual lever position sensor.

MLUS

Modulated lock up solenoid.

Mm

Millimeter.

MMC

An acronym for metal matrix composite.

MMM

Acronym for Memory Mirror Module (GM).

MMT

An acronym for Methylcyclopentadienyl Manganese Tricarbonyl A Metalic compound used in Canada as an Octane improver.

Mn

Manganese An element with the atomic number of 25.

Mo

Molybdenum An element with the atomic number of 42.

Mobile Air Conditioning Society (MACS)

A nonprofit organization founded in 1981 for the dissemination of distribution of comprehensive technical information, training, and communications to its members consisting of automotive air-conditioning shops, installers, distributors, supplies, and manufacturers in the United States and Canada.

Mobile5A

A model for vehicle emissions.