Low Idle Stability (ICP Pressure)
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.
- Check at low idle and EOT above 70°C (158° F)
- Monitor the ICP and RPM PIDS with the scan tool.
| Parameter | Specification @ 670 RPM | Measurement |
|---|---|---|
| ICP | 4.5 - 5.5 MPa +/- 0.3 MPa (650-800 psi +/- 45 psi) (F-Super Duty/ Excursion - Early Build) 4.0 - 5.0 MPa +/- 0.3 MPa (580-725 psi +/- 45 psi) (E-Series or F-Super Duty/ Excursion - Late Build) | |
| Take reading before disconnecting ICP sensor. | ||
If engine RPM is unstable, disconnect the ICP sensor.
- ICP will default to 5.0 MPa (725 psi) when disconnected.
- If RPM smooths out, the ICP sensor or circuit is suspect.
- If RPM is still unstable, reconnect the ICP sensor and go to 12B. INJECTION PRESSURE REGULATOR TEST .