Chart 7
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
- Lack/Loss Of Power
- Runs Rough
- Misses
- Buck/Jerk
- Hesitation/Stumble
- Surge
- Additional Driveability Concerns: Poor Fuel Economy
NOTE:
Perform the following preliminary checks:
- Confirm brakes are not dragging.
- Check for oil in coolant.
- Check for correct engine oil level.
- Confirm acceptable SAE oil viscosity and API rating of oil.
- Confirm oil change within 12,070 km (7,500 miles).
- Check air intake system: check for intake restriction. Air filter restriction gauge/air filter.
- Check MAP sensor hose for holes, blockage, or disconnection.
- Check EP sensor and tube for holes, blockage, or disconnection.
- Check intake system for leaks.
- Check for low boost pressure.
- Check for over boost condition.
- Check for sufficient clean fuel.
- Check for air in fuel.
- Compare loaded weight of vehicle with performance expectations.
- Power monitor active.
- Transmission concerns.
| SYSTEM/COMPONENT | REFERENCE (PINPOINT TEST - 6.0L DIESEL unless noted) |
|---|---|
| Perform KOEO On-Demand Self Test | GO to the appropriate pinpoint test if fault is indicated. |
| Perform KOEO Injector Electrical Self Test (Click Test) | GO to the appropriate pinpoint test if fault is indicated. |
| Retrieve/Clear Continuous DTCs | GO to the appropriate pinpoint test if fault is indicated. |
| Check For Biased ICP Sensor | GO to PINPOINT TEST Q: INJECTION CONTROL PRESSURE (ICP) SENSOR . |
| Check Fuel Pump Pressure | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , Performance Diagnostic Procedures. PERFORM Fuel Pump Pressure Test. |
| Check Fuel Regulator | INSTALL a new regulator valve if there is evidence of sticking or foreign material. |
| Check For Aerated Oil | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , Performance Diagnostic Procedures. PERFORM Oil Aeration Test. |
| Injection Control Pressure Test | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , Performance Diagnostic Procedures. PERFORM Low Idle Stability (ICP Pressure) Test. |
| Check For Low FICM Power | GO to PINPOINT TEST S: FUEL INJECTOR CONTROL MODULE (FICM) LOW VOLTAGE . |
| Check Lubrication Pressure | Refer to the appropriate ENGINE article. |
| KOEO On-Demand Self Test | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , Performance Diagnostic Procedures. PERFORM KOEO On-Demand Self Test. If DTC P2291 is present, GO to PINPOINT TEST AQ: INJECTION CONTROL PRESSURE TOO LOW - ENGINE . |
| Check For Biased EP Sensor | GO to PINPOINT TEST X: EXHAUST PRESSURE (EP) SENSOR . |
| Check For Engine Wear | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , Performance Diagnostic Procedures. PERFORM Crankcase Pressure Test. |
| Check For Piston Or Valve Leaks | Refer to the appropriate ENGINE article. |
| Check For Exhaust Restriction | MEASURE exhaust pressure (EP). If EP is greater than 234 kPa (34 psi) or 2 V, LOCATE and REPAIR restriction in exhaust system. VERIFY repair. |
| Atmospheric Pressure Rationality Check | GO to DIAGNOSTIC METHODS - 6.0L DIESEL Parameter Identification (PID). With KOEO, SELECT Parameter Identification (PID). SELECT PIDs: EP, MAP and BARO. If any PID values/readings deviated from atmospheric pressure in your locale by more than 10 kPa (1.5 psi), GO to the appropriate pinpoint test for the sensor with the largest difference. |
| Check For Biased EOT Sensor | GO to L: Engine Oil Temperature (EOT) Sensor STEP L17 CHECK FOR BIASED EOT SENSOR. |
| Transmission Concerns | Refer to the appropriate TRANSMISSION article, Diagnosis by Symptom. |
| Check EGR Operation | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL , EGR Position Test. |
| Check Mass Air Flow Performance | GO to PINPOINT TEST J: MASS AIR FLOW (MAF) SENSOR . |
| Check Power Monitor | GO to PINPOINT TEST AT: FICM CIRCUIT FUEL DELIVERY ERROR . |
| Check Turbocharger | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL . Performance Diagnostic Procedures. CARRY OUT the Boost Pressure Test. |
| Check Injector Operation | GO to DIAGNOSTIC SUBROUTINES - 6.0L DIESEL . Perform the Injector Interrupt For Enhanced Diagnostics Test. |