Chart 6

Unique Idle Concerns:

Stalls/Quits

SYSTEM/COMPONENT	REFERENCE ( PINPOINT TEST - CNG, FLEX-FUEL & GASOLINE ) unless noted
Verify fuel filler cap is properly tightened	Visual
For A/T with Stalls/Quits on deceleration: Transmission	Automatic Transaxle/Transmission - Refer to the appropriate AUTOMATIC TRANSMISSION article (Diagnosis By Symptom: Torque Converter Concerns).
For Low idle with A/C on (4.6/5.4L/6.8L E -Series): Check ACCS PID with A/C on and engine running (PID should indicate ON when A/C clutch is engaged). (On applications where the PCM cannot control the A/C clutch on and off, the PCM uses the ACCS circuit to determine additional load on the engine.)	ACCS PID does not indicate ON with A/C clutch engaged: GO to M: Air conditioning clutch relay circuit STEP KM7.
Fuel Delivery System	Natural Gas Applications: GO to B: Natural Gas Fuel Delivery System STEP HB1. All Others: GO to C: Fuel Delivery System STEP HC1.
Intake Air System	GO to U: Intake Air Systems STEP HU1.
Base Engine	Engine System - Refer to the appropriate ENGINE article.
Additional Checks: Check if the operation of certain systems are causing the low idle.	Visual
Additional Testing	GO to Z: Intermittent STEP Z1.