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.
DC9 CHECK THE INTAKE AIR SYSTEM FOR LEAKS
NOTICE: Pressure above 241 kPa (35 psi) can cause damage to system components. Regulate the shop air to 137.9 kPa (20 psi) before connecting to the system.
• Ignition OFF.
• Connect the Rotunda Smoke Machine, Fuel Evaporative Emission System Tester 218-00001 (522) or equivalent to the intake air system.
• Fill the intake air system with smoke.
• Pressurize the intake air system with 137.9 kPa (20 psi) regulated shop air.
• Check the intake air system for leaks.
Are any leaks or restrictions present?
Yes | No |
|---|---|
REPAIR the leaks or restrictions. Clear the PCM DTCs. REPEAT the self-test. | GO to DC10 . |
DC10 CHECK THE MAF PID
• Access the PCM and monitor the RPM (RPM) PID.
• Access the PCM and monitor the MAF (VOLT) PID.
• Run the engine up to 1,500 RPM for 5 seconds, then bring it back to idle. Run the engine up to 1,500 RPM for 5 seconds, then bring it back to idle.
Is the voltage less than 0.3 V?
Yes | No |
|---|---|
CLEAN the MAF/IAT sensor using CRC Mass Air Flow Sensor Cleaner 05110 or equivalent. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. If the concern is still present, INSTALL a new MAF/IAT sensor. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. | GO to DC11 . |
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.