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Home >> Toyota >> 1994 >> Corolla Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Control >> Fuel Cut System
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Fuel Cut System

  1. Install tachometer. Tachometer must be connected to proper terminals. See IDLE SPEED & MIXTURE in ADJUSTMENTS article.
    CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. To avoid possible damage to ignitor and/or coil, DO NOT  allow tachometer terminal to become grounded.
  2. Start engine and warm to normal operating temperature. Ensure all accessories are off. Gradually increase engine RPM to maintain at least specified engine speed. See FUEL CUT SYSTEM TESTING SPECIFICATION  table.
    FUEL CUT SYSTEM TESTING SPECIFICATION

    Application Engine RPM
    Corolla 3500
  3. Using stethoscope, check for fuel injector operating sound. Ensure when throttle lever is released, fuel injector stops operating momentarily (fuel cut RPM) and then resumes operating (fuel return RPM).
  4. Ensure fuel cut RPM (if available) and fuel return RPM are within specification. See FUEL CUT SYSTEM SPECIFICATIONS  table. Shut engine off. Disconnect tachometer.
FUEL CUT SYSTEM SPECIFICATIONS (1)

Application Fuel Cut RPM Fuel Return RPM
Corolla (2) 1400
(1) Check with A/C off.
(2) Fuel cut specification is not available from manufacturer.
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