Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
HU: Intake Air Systems
HU: Introduction
HU1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Are DTCs P0505, P0506, P0660, P0663, P2004, P2005, P2006, P2007, P2008, P2011, P2014, P2019, P2070, or P2071 present?
Yes | No |
|---|---|
For DTCs P0505 or P0506, GO to HU2 . For DTCs P0660, P0663, P2070 or P2071, GO to HU9 . For all others, GO to HU18 . | For lack/loss of power, GO to HU9 . For all other symptoms without DTCs, GO to HU2 . |
HU2 CHECK THE BASE IDLE SPEED
Note: The vehicle must be at operating temperature and at idle for a minimum of 1 minute.
• Ignition ON, engine running.
• Determine if the idle speed is incorrect. Refer to the Section 6 Typical Reference Value Charts, if necessary.
• Access the PCM and monitor the RPM (RPM) PID.
Is vehicle idle speed correct?
Yes | No |
|---|---|
GO to HU4 . | GO to HU3 . |
HU3 CHECK FOR VACUUM LEAKS
• Listen for vacuum leaks.
• Inspect the entire intake air system from the mass airflow (MAF) sensor to the intake manifold for leaks such as:
◾ cracked or punctured intake air tube. ◾ loose connections on the intake air tube at the air cleaner housing or throttle body ◾ EGR valve gasket leak to intake manifold ◾ intake manifold assembly or gasket ◾ EGR valve diaphragm or control solenoid ◾ vacuum supply connectors and hose
Are any leaks present?
Yes | No |
|---|---|
GO to HU4 . |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.