Fuel Cut System

WARNING: This page is about a different variant/trim than selected.

When testing fuel cut system, monitor engine RPM using scan tester. Connect scan tester to data link connector No. 3 for monitoring engine RPM. For connecting of scan tester, see appropriate application under IDLE SPEED & MIXTURE in ADJUSTMENTS - 3.4L article.
Start and warm engine to normal operating temperature. Ensure A/C and all accessories are off. Gradually increase engine RPM to at least 3500 RPM.
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).
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

4Runner

1500

⁽¹⁾	Check with engine at normal operating temperature and with the A/C and all accessories off.