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Isoblock

A hard-rubber insulator block used for motor mounts.

Isobutylene

A refinery process petrochemical that is reacted with methanol to form MTBE or with ethanol to form ETBE.

Isolate

A technique where a component or system may be separated from the rest of the component or system without the los of fluids or pressures.

Isolate, Hold And Dump

Actions commanded by the ABS microprocessor to regulate hydraulic pressure to an individual wheel brake.

Isolator

A rubber or synthetic device used to separate two parts to reduce noise or vibration.

Isolator Pad

A rubber or synthetic device used to separate two parts to reduce noise or vibration.

Isomers

Chemical compounds having the same molecular weight and atomic structure, but a different molecular structure.

ISP

An acronym for an Internet Service Provider; a company that provides you access to the internet for a fee, the service provider gives you a software package, username, password, and access phone number.

ISS

Idle speed solenoid or idle stop solenoid.

ISV

Idle speed valve.

ITCS

Ignition timing control system.

ITPA

An acronym for International Truck Parts Association.

ITR

In-tank reservoir.

ITS

Idle tracking switch.

ITVS

Ignition timing vacuum switch.

IVR Instrument Voltage Regulator

An IVR is used to maintain constant voltage to thermoelectric gauges to maintain accuracy.

IVSV

Idle vacuum switching valve.