Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA1994INTEGRA (GS-R) L4-1797CC 1.8L DOHC (VTEC)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONGENERAL SYSTEM DESCRIPTION
1994 Acura Integra (GS-R) L4-1797cc 1.8L DOHC (VTEC)
General System Description
1994 Acura Integra (GS-R) L4-1797cc 1.8L DOHC (VTEC)SECTION General System Description
PURPOSE
The Programed Fuel Injection (PGM-FI) Engine Control Module (ECM) is the primary emission control device. Fuel injection offers precise fuel control over a wide range of conditions. Feedback supplied by the Heated Oxygen Sensor engine sensors allows the injection system to compensate for changes in atmospheric conditions (temperature, altitude, etc.) as well as mechanical conditions (such as state of tune, etc.).
FAIL-SAFE FUNCTION
An array of underhood sensors continually report all aspects of engine operation to the ECM.
If a sensor is perceived by the ECM to be providing inaccurate data, it reverts operation to a pre-programmed value, to allow the vehicle to operate until repairs can be made.
When such a problem occurs, the ECM illuminates the Malfunction Indicator Light (MIL) on the instrument cluster to alert the driver that a fault has occurred and that the vehicle requires service.
BACK-UP FUNCTION
When the ECM is the problem, the fuel injectors are controlled by a back-up circuit independent of the system in order to permit minimal driving.
The Programed Fuel Injection (PGM-FI) Engine Control Module (ECM) is the primary emission control device. Fuel injection offers precise fuel control over a wide range of conditions. Feedback supplied by the Heated Oxygen Sensor engine sensors allows the injection system to compensate for changes in atmospheric conditions (temperature, altitude, etc.) as well as mechanical conditions (such as state of tune, etc.).
FAIL-SAFE FUNCTION
An array of underhood sensors continually report all aspects of engine operation to the ECM.
If a sensor is perceived by the ECM to be providing inaccurate data, it reverts operation to a pre-programmed value, to allow the vehicle to operate until repairs can be made.
When such a problem occurs, the ECM illuminates the Malfunction Indicator Light (MIL) on the instrument cluster to alert the driver that a fault has occurred and that the vehicle requires service.
BACK-UP FUNCTION
When the ECM is the problem, the fuel injectors are controlled by a back-up circuit independent of the system in order to permit minimal driving.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.