Fuel Delivery and Air Induction: Testing and Inspection
FUEL CUT RPMINSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
3. INSPECT FUEL CUT OFF RPM
a. Increase the engine speed to at least 3,500 rpm.
b. Use a sound scope to check for injector operating noise.
Fuel Return rpm:
c. Check that when the throttle lever is released, injector operation noise stops momentarily and then resumes.
HINT: Measure with the A/C OFF.
4. DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL