Fuel Cut System

When testing fuel cut system, monitor engine RPM 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 - 3.4L article.
NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 1) to step 3). No test procedures have been omitted.
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

3.4L

1500

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