System Inspection

P0507 Idle Air Control System-RPM Higher than Expected

Inspection/Repair - System Inspection

Accelerator Cable & Throttle plate Inspection

1. Visually/physically inspect the following items. Repair or adjust as necessary and go to next step.
- Check that the Accelerator Cable is not sticking or moving sluggishly.
- Check Accelerator Cable free play [0.040 - 0.120 in. (1.0 - 3.0 mm)].
2. Remove Intake Hose and inspect Throttle Plate for excessive carbon deposits.
3. Is Throttle Plate being held open with excessive carbon deposits?






Air Leakage Inspection

1. Visually/physically inspect the air leakage in intake/exhaust system as following items,
- Check for throttle Plate being held open with excessive carbon deposits
- Vacuum hoses for splits, kinks and improper connections.
- Throttle body gasket
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning.
- Gasket between intake manifold and cylinder head
- Seals between intake manifold and fuel injectors
- Exhaust system between HO2S and Three way catalyst for air leakage
2. Was a problem found in any of the above areas?