Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004ECONOLINE E150, VAN CARGO, 4.6 WREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYMPTOM CHARTS - CNG, FLEX-FUEL & GASOLINESTEP 3: NO DTC(S) PRESENT SYMPTOM CHARTSCHART 6
2004 Ford Econoline E150, Van Cargo, 4.6 W
Chart 6
2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION Chart 6
Unique Idle Concerns:
- Low/Slow Idle
Stalls/Quits
- Deceleration
| 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:
|
Visual |
| Additional Testing | GO to Z: Intermittent STEP Z1. |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.