- L -

LFP

Low fuel pump.

LGM

1. Acronym for Liftgate Control Module (GM).

LH

[1] Left hand [2] (Porsche) Hot Wire Air Mass Meter.

LH-Jetronic

An electronic fuel-injection system by Bosch that uses a mass airflow sensor with a digital control unit.

LHV

An acronym for lower heating valve.

Li

Lithium An element with the atomic number of 3.

Lid

The cylinder head on a flathead or L-head engine.

Life Expectancy

The anticipated longevity of a part, assembly or component.

Lift

1. The amount of the opening of a valve. 2. The amount of rise generated by a lob of the camshaft. 3. An upward force caused by the airflow around the vehicle.

Lift It

Get off the throttle.

Lift Kit

A suspension package designed to raise the vehicle body above the frame and tires.

Lift-throttle Oversteer

A loss of grip on the drive wheels of a rear-drive vehicle when the throttle is lifted during fast cornering causing the rear of the vehicle to swing toward the outside of the turn.

Liftback

A rear luggage compartment that is an extension of the passenger compartment with access gained through an upward-opening, hatch-type door.

Lifter

1. A part between the camshaft and push rod on an OHV engine. 2. A part between the camshaft and valve stem on an OHC engine. 3. Also known as follower.

Lifter Bore

The hole in which a valve lifter is located.

Liftgate

The rear opening of a hatchback or liftback.

Light Emitting Diode (LED)

A semiconductor diode that radiates light when the junction is forward biased and a specified current flows through the diode.

Light End Hydrocarbons

Term used to denote hydrocarbons from crude distillation that are low density (lighter weight than gasoline) and have low boiling temperatures. Butanes are the most common light end hydrocarbons used in gasoline.

Light It Off

Start an engine.

Light The Rugs

To smoke the drive tires at the start of the race.