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.
HD: Misfire Detection Monitor
HD: Introduction
HD1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Are DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0313, P0315, P0316 or P1336 present?
Yes | No |
|---|---|
For DTC P0315, GO to HD19 . For DTC P1336, GO to HD16 . For all others, GO to HD2 . | RETURN to Section 3 , Symptom Charts for further direction. |
HD2 VIEW THE PCM MISFIRE FREEZE FRAME DATA
Note: The misfire freeze frame data may be used to determine the operating conditions when the misfire DTC was set.
• Retrieve and record any available misfire freeze frame data PID values from the PCM.
• Compare recorded freeze frame data PID values to the typical reference values in Section 6 , Reference Values.
Are any values out of range?
Yes | No |
|---|---|
GO to Pinpoint Test Z . | GO to HD3 . |
HD3 RELATIVE COMPRESSION TEST
Note: The IDS test referenced in this step may not be available on all vehicles. Follow the YES answer if the IDS test is not available.
• Carry out the Relative Compression Test. Refer to the instruction manual provided by the scan tool manufacturer.
Do all cylinders pass the test?
Yes | No |
|---|---|
GO to HD4 . | CARRY OUT a cylinder compression test on the suspected cylinder. REFER to the Workshop Manual Section 303-00, Engine |
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.