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Home >> Toyota >> 1997 >> T100 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 2.7L >> Fuel System >> Fuel Control >> Fuel Cut System
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Fuel Cut System

  1. When testing fuel cut system, engine RPM must be monitored using scan tool. Connect scan tool to data link connector No. 3 for monitoring engine RPM. For connecting of scan tool, see appropriate application under IDLE SPEED & MIXTURE in ADJUSTMENTS - 2.7L article.
  2. Start and warm engine to normal operating temperature. Ensure the A/C and all accessories are off. Gradually increase engine RPM to maintain at least specified engine speed. See FUEL CUT SYSTEM TESTING SPECIFICATIONS  table.
    FUEL CUT SYSTEM TESTING SPECIFICATIONS

    Application Engine RPM
    2.7L 3000
  3. Using stethoscope, check for fuel injector operating sound. Ensure when throttle lever is released, fuel injector stops operating momentarily and then resumes operating (fuel return RPM).
  4. Ensure fuel return RPM is within specification. See FUEL CUT SYSTEM SPECIFICATIONS  table. Shut engine off. Remove test equipment.
FUEL CUT SYSTEM SPECIFICATIONS (1)

Application Fuel Return RPM
A/T 1500
M/T 1400
(1) Check with engine at normal operating temperature and A/C off.
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